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frontpageRokket | Staff posted Mar 07, 2026 05:02 AM
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frontpageRokket | Staff posted Mar 07, 2026 05:02 AM

20-Oz Hydro Flask Insulated Food Jar

$20

$40

50% off
Amazon
15 Comments 23,815 Views
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Deal Details
Amazon has 20-Oz Hydro Flask Insulated Food Jar (Black) for $19.98. Shipping is free with Prime or on $35+ orders.

Alternatively, Hydro Flask has 20-Oz Hydro Flask Insulated Food Jar (Cascade) for $19.98. Shipping is free on $39+ orders.

Thanks to Deal Hunter Rokket for finding this deal.

About this Item:
  • TempShield double-wall vacuum insulation
  • Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavor transferLeakproof when closed
  • Color Last powder coat is dishwasher safe keeping your bottle slip-free and colorful
  • BPA-Free & Toxin-Free

Editor's Notes

Written by johnny_miller | Staff
  • This offer is $2.02 lower than a Frontpage Deal from May 2025.
  • Rated 4.4 out of 5 stars based on over 2.7k Amazon customer reviews.
  • Please see the original post for additional details & give the forum comments a read for helpful discussion.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by Rokket | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has 20-Oz Hydro Flask Insulated Food Jar (Black) for $19.98. Shipping is free with Prime or on $35+ orders.

Alternatively, Hydro Flask has 20-Oz Hydro Flask Insulated Food Jar (Cascade) for $19.98. Shipping is free on $39+ orders.

Thanks to Deal Hunter Rokket for finding this deal.

About this Item:
  • TempShield double-wall vacuum insulation
  • Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavor transferLeakproof when closed
  • Color Last powder coat is dishwasher safe keeping your bottle slip-free and colorful
  • BPA-Free & Toxin-Free

Editor's Notes

Written by johnny_miller | Staff
  • This offer is $2.02 lower than a Frontpage Deal from May 2025.
  • Rated 4.4 out of 5 stars based on over 2.7k Amazon customer reviews.
  • Please see the original post for additional details & give the forum comments a read for helpful discussion.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by Rokket | Staff

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Model: Hydro Flask Insulated Food Jar 20 oz

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Sort: Lowest to Highest | Last Updated 3/14/2026, 10:02 AM
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Top Comments

Giantcrazy
3489 Posts
622 Reputation
I've found that if you heat up the jar first (by putting some boiling water in it and capping it for a few minutes) then anything you put in that's hot will remain hot for a few hours. If it goes in at nearly boiling temps you'll get to the just-barely-cool-enough-to-eat range about 4 hours later. I've done this a couple of times when taking hot stew/chili on the boat during cold weather.
Put hot food in a room temp container and you'll have room temp food in that same time period.
GreySquirrel365
299 Posts
38 Reputation
damn, am I old? Are Thermos no longer something that people know exist?
Also food safety gets way too much armchairing. If these vacuum containers are any good (idk if this particular one is), it can keep food pretty hot for a surprisingly long time. USDA recommends not leaving food out for 2 hours. Even with no intervention the window is fairly large. When you cooked the food, you killed off the majority of bacteria so hot food in insulated jar is likely good for several hours (easily span morning to lunch). Realistically, if your goal is just to not shit your pants, rather than avoid getting fined by health inspector, you have a lot of leeway
JellyJelly22
283 Posts
166 Reputation
hot lunch for school kids...

15 Comments

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Mar 07, 2026 03:52 PM
134 Posts
Joined May 2021
HonestPiranha4587Mar 07, 2026 03:52 PM
134 Posts
Maybe I'm too dumb to understand what this is for. It's insulated to keep something hot or cold. If it's for hot food, you really don't wanna keep it hot for very long because it's going to be in that unsafe temperature window for bacteria.

If it's for cold food, when it comes time to eat it you can't put this metal container in the microwave so you have to eat it cold. Or transfer it to a different container which kind of defeats the purpose.

So what are people using this for? Gazpacho?
1
Mar 07, 2026 04:27 PM
283 Posts
Joined Nov 2014
JellyJelly22Mar 07, 2026 04:27 PM
283 Posts

Our community has rated this post as helpful. If you agree, why not thank JellyJelly22

Quote from HonestPiranha4587 :
Maybe I'm too dumb to understand what this is for. It's insulated to keep something hot or cold. If it's for hot food, you really don't wanna keep it hot for very long because it's going to be in that unsafe temperature window for bacteria.

If it's for cold food, when it comes time to eat it you can't put this metal container in the microwave so you have to eat it cold. Or transfer it to a different container which kind of defeats the purpose.

So what are people using this for? Gazpacho?
hot lunch for school kids...
2
Mar 07, 2026 06:00 PM
2,906 Posts
Joined May 2018
TimlessMar 07, 2026 06:00 PM
2,906 Posts
Yea. Very limited use. Have several of these. End up using it for ice.
2
2
Mar 07, 2026 11:11 PM
3,489 Posts
Joined Sep 2006
GiantcrazyMar 07, 2026 11:11 PM
3,489 Posts

Our community has rated this post as helpful. If you agree, why not thank Giantcrazy

Quote from HonestPiranha4587 :
Maybe I'm too dumb to understand what this is for. It's insulated to keep something hot or cold. If it's for hot food, you really don't wanna keep it hot for very long because it's going to be in that unsafe temperature window for bacteria.

If it's for cold food, when it comes time to eat it you can't put this metal container in the microwave so you have to eat it cold. Or transfer it to a different container which kind of defeats the purpose.

So what are people using this for? Gazpacho?
I've found that if you heat up the jar first (by putting some boiling water in it and capping it for a few minutes) then anything you put in that's hot will remain hot for a few hours. If it goes in at nearly boiling temps you'll get to the just-barely-cool-enough-to-eat range about 4 hours later. I've done this a couple of times when taking hot stew/chili on the boat during cold weather.
Put hot food in a room temp container and you'll have room temp food in that same time period.
4
Mar 08, 2026 04:47 AM
299 Posts
Joined Mar 2021
GreySquirrel365Mar 08, 2026 04:47 AM
299 Posts
Quote from HonestPiranha4587 :
Maybe I'm too dumb to understand what this is for. It's insulated to keep something hot or cold. If it's for hot food, you really don't wanna keep it hot for very long because it's going to be in that unsafe temperature window for bacteria.

If it's for cold food, when it comes time to eat it you can't put this metal container in the microwave so you have to eat it cold. Or transfer it to a different container which kind of defeats the purpose.

So what are people using this for? Gazpacho?
damn, am I old? Are Thermos no longer something that people know exist?
Also food safety gets way too much armchairing. If these vacuum containers are any good (idk if this particular one is), it can keep food pretty hot for a surprisingly long time. USDA recommends not leaving food out for 2 hours. Even with no intervention the window is fairly large. When you cooked the food, you killed off the majority of bacteria so hot food in insulated jar is likely good for several hours (easily span morning to lunch). Realistically, if your goal is just to not shit your pants, rather than avoid getting fined by health inspector, you have a lot of leeway
Mar 08, 2026 05:46 AM
10 Posts
Joined Feb 2023
SmartMitten1737Mar 08, 2026 05:46 AM
10 Posts
The 28 oz color cascade is also on sale for $22.48, 50% off of $44.95
Mar 08, 2026 05:54 AM
59 Posts
Joined Jan 2017
mkthordsMar 08, 2026 05:54 AM
59 Posts
thanks

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Mar 08, 2026 06:32 AM
1 Posts
Joined Mar 2026
SociableSardine7821Mar 08, 2026 06:32 AM
1 Posts
Quote from GreySquirrel365 :
damn, am I old? Are Thermos no longer something that people know exist?
Also food safety gets way too much armchairing. If these vacuum containers are any good (idk if this particular one is), it can keep food pretty hot for a surprisingly long time. USDA recommends not leaving food out for 2 hours. Even with no intervention the window is fairly large. When you cooked the food, you killed off the majority of bacteria so hot food in insulated jar is likely good for several hours (easily span morning to lunch). Realistically, if your goal is just to not shit your pants, rather than avoid getting fined by health inspector, you have a lot of leeway
Yeah bacterial growth happens in a few hours and can make you uncomfortable or slightly sick. Actual spoilage is when that bacteria eats the food and leaves toxins. That's when you get proper food poisoning and it takes a very long time in the "danger zone" before it's a problem to eat then and there.
Mar 08, 2026 08:06 AM
4,790 Posts
Joined Sep 2013
zapppzMar 08, 2026 08:06 AM
4,790 Posts
Quote from HonestPiranha4587 :
Maybe I'm too dumb to understand what this is for. It's insulated to keep something hot or cold. If it's for hot food, you really don't wanna keep it hot for very long because it's going to be in that unsafe temperature window for bacteria.If it's for cold food, when it comes time to eat it you can't put this metal container in the microwave so you have to eat it cold. Or transfer it to a different container which kind of defeats the purpose.So what are people using this for? Gazpacho?
Bacteria are killed by cooking food already. It's in a closed insulated environment so bacteria can't get in or already dead inside due to pressured heat (unless you keep cap off for prolonged period of time)

Cold food you generally want to keep cold thus microwave is not needed
Pro
Mar 08, 2026 09:30 AM
512 Posts
Joined Feb 2018
Nm4223
Pro
Mar 08, 2026 09:30 AM
512 Posts
Is it good for pep vials storage?
Mar 08, 2026 01:21 PM
20 Posts
Joined Mar 2006
titanicsinkMar 08, 2026 01:21 PM
20 Posts
Quote from SociableSardine7821 :
Yeah bacterial growth happens in a few hours and can make you uncomfortable or slightly sick. Actual spoilage is when that bacteria eats the food and leaves toxins. That's when you get proper food poisoning and it takes a very long time in the "danger zone" before it's a problem to eat then and there.
Its really 2 options, Either put the food in stright from being cooked, so its hot and the bacteria was killed off by cooking, or put the food in from being kept cold and will stay cold so no bacteria will grow.

A proper thermos should be able to keep the food above the 140 F mark for multiple hours(specifically a lunch)
Mar 08, 2026 01:22 PM
283 Posts
Joined Nov 2014
JellyJelly22Mar 08, 2026 01:22 PM
283 Posts
Quote from SociableSardine7821 :
Yeah bacterial growth happens in a few hours and can make you uncomfortable or slightly sick. Actual spoilage is when that bacteria eats the food and leaves toxins. That's when you get proper food poisoning and it takes a very long time in the "danger zone" before it's a problem to eat then and there.
It's ok, eating some bacteria is good for your immune system, do you know bateria are everywhere? stomach acid will kill most of it.

The 28oz is also on sale at$22
1
Mar 08, 2026 06:23 PM
5,294 Posts
Joined Dec 2007
Strmtrper6Mar 08, 2026 06:23 PM
5,294 Posts
Quote from Giantcrazy :
I've found that if you heat up the jar first (by putting some boiling water in it and capping it for a few minutes) then anything you put in that's hot will remain hot for a few hours. If it goes in at nearly boiling temps you'll get to the just-barely-cool-enough-to-eat range about 4 hours later. I've done this a couple of times when taking hot stew/chili on the boat during cold weather.
Put hot food in a room temp container and you'll have room temp food in that same time period.
This one in particular? I have a couple Thermos and RTIC ones and I've never needed to do this. The vacuum insulation is good enough that the tiny bit of metal on the inner wall doesn't really steal any of the heat.
Mar 08, 2026 06:31 PM
5,294 Posts
Joined Dec 2007
Strmtrper6Mar 08, 2026 06:31 PM
5,294 Posts
Quote from HonestPiranha4587 :
Maybe I'm too dumb to understand what this is for. It's insulated to keep something hot or cold. If it's for hot food, you really don't wanna keep it hot for very long because it's going to be in that unsafe temperature window for bacteria.

If it's for cold food, when it comes time to eat it you can't put this metal container in the microwave so you have to eat it cold. Or transfer it to a different container which kind of defeats the purpose.

So what are people using this for? Gazpacho?
You can get ones with plastic insert(s) for microwaving if that's what you need,

But this will easily keep food hot enough for a few hours for lunches and such without any such danger zone. Ever been to a buffet?

People have been using Thermos bottles for decades to keep food hot for lunch on the job site. My dad had one in the 40s when he worked in road construction and he survived.

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Mar 11, 2026 04:25 PM
891 Posts
Joined Nov 2010
Jerry_ClarkmanMar 11, 2026 04:25 PM
891 Posts
Quote from GreySquirrel365 :
damn, am I old? Are Thermos no longer something that people know exist?Also food safety gets way too much armchairing. If these vacuum containers are any good (idk if this particular one is), it can keep food pretty hot for a surprisingly long time. USDA recommends not leaving food out for 2 hours. Even with no intervention the window is fairly large. When you cooked the food, you killed off the majority of bacteria so hot food in insulated jar is likely good for several hours (easily span morning to lunch). Realistically, if your goal is just to not shit your pants, rather than avoid getting fined by health inspector, you have a lot of leeway
This is the way! Cook the food (which kills the bacteria) not reheat up the food in the microwave. Then place in container and seal right away. At this point there's very little bacteria in there. By the time you eat it, there may be a few hundred MAX. Bacteria doubles every 20-30 minutes.

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