expired
Upcoming: Costco Wholesale Members: In-Warehouse & Online Savings
See Thread for Pricing
(Valid 12/22/25 - 1/19/26)at Costco Wholesale
Missed This Deal? Get alerts when similar deals are posted.
(Valid 12/22/25 - 1/19/26)at Costco WholesaleDeal Details
Note: These deals start December 22; we are promoting them on the Frontpage ahead of time due to strong feedback from the community.
Costco Wholesale (link not live yet; see original post for full scans of deals) has In-Warehouse & Online Deals listed below valid for Costco Members only.
Thanks to Community Member worldofcolor for sharing this deal.
Costco Wholesale (link not live yet; see original post for full scans of deals) has In-Warehouse & Online Deals listed below valid for Costco Members only.
Thanks to Community Member worldofcolor for sharing this deal.
- Note: An active Costco Wholesale Membership is required to visit/purchase items at these warehouse prices. Prices & availability may vary by location.
- Optimum Nutrition Gold Standard 100% Whey Protein Powder (5.64-lbs Extreme Milk Chocolate or 5.47-lbs Vanilla Ice Cream) $49.99 ($15 Off, Limit 2 each)
- Thanks FehmiP [discuss]
- 2-Pack Lee Youth Jogger Pant $9.99 ($3 Off, Limit 10)
- 2.5-lbs Mt. Comfort Coffee Organic Peru Whole Bean Coffee $15.89 ($4.10 Off, Limit 5)
- 8-Pack 12-Oz SPAM (25% Less Sodium) $6.40 Off (Limit 4)
- 50.9-Oz Ajinomoto Japanese Style Pork & Chicken Gyoza $4 Off (no limit)
- 15-Count Sandwich Bros. Chicken Melts Pita Snack Sandwiches $3.50 Off (no limit)
- & More (see original post for ad scans)
Editor's Notes
Written by StrawMan86 | Staff- Sale event valid from December 22, 2025 through January 19, 2026.
- Active Costco membership required for warehouse purchases.
- Valid at all U.S. Costco warehouse locations and at Costco.com during the promotion period, unless otherwise noted.
- Online-only promotions valid only for purchases on Costco.com.
- Pricing on Costco.com may be higher than Costco warehouse pricing.
- Shipping and handling charge(s) may apply on items available at Costco.com; products shipped to Alaska or Hawaii will include an additional shipping and handling fee which will be quoted at checkout. Not valid at Costco Business Centers. Item limits per household apply where indicated except where prohibited by law. Selection and pricing may vary and is subject to availability. While supplies last.
- Refer to the original post & forum comments for additional deal ideas & discussion.
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Note: These deals start December 22; we are promoting them on the Frontpage ahead of time due to strong feedback from the community.
Costco Wholesale (link not live yet; see original post for full scans of deals) has In-Warehouse & Online Deals listed below valid for Costco Members only.
Thanks to Community Member worldofcolor for sharing this deal.
Costco Wholesale (link not live yet; see original post for full scans of deals) has In-Warehouse & Online Deals listed below valid for Costco Members only.
Thanks to Community Member worldofcolor for sharing this deal.
- Note: An active Costco Wholesale Membership is required to visit/purchase items at these warehouse prices. Prices & availability may vary by location.
- Optimum Nutrition Gold Standard 100% Whey Protein Powder (5.64-lbs Extreme Milk Chocolate or 5.47-lbs Vanilla Ice Cream) $49.99 ($15 Off, Limit 2 each)
- Thanks FehmiP [discuss]
- 2-Pack Lee Youth Jogger Pant $9.99 ($3 Off, Limit 10)
- 2.5-lbs Mt. Comfort Coffee Organic Peru Whole Bean Coffee $15.89 ($4.10 Off, Limit 5)
- 8-Pack 12-Oz SPAM (25% Less Sodium) $6.40 Off (Limit 4)
- 50.9-Oz Ajinomoto Japanese Style Pork & Chicken Gyoza $4 Off (no limit)
- 15-Count Sandwich Bros. Chicken Melts Pita Snack Sandwiches $3.50 Off (no limit)
- & More (see original post for ad scans)
Editor's Notes
Written by StrawMan86 | Staff- Sale event valid from December 22, 2025 through January 19, 2026.
- Active Costco membership required for warehouse purchases.
- Valid at all U.S. Costco warehouse locations and at Costco.com during the promotion period, unless otherwise noted.
- Online-only promotions valid only for purchases on Costco.com.
- Pricing on Costco.com may be higher than Costco warehouse pricing.
- Shipping and handling charge(s) may apply on items available at Costco.com; products shipped to Alaska or Hawaii will include an additional shipping and handling fee which will be quoted at checkout. Not valid at Costco Business Centers. Item limits per household apply where indicated except where prohibited by law. Selection and pricing may vary and is subject to availability. While supplies last.
- Refer to the original post & forum comments for additional deal ideas & discussion.
Community Voting
Deal
Score
+206
Good Deal
Bad Deal
Top Comments
https://imgur.com/a/OS2JVim
Community Reviews
The strongest thread takeaway is protein powder, especially Optimum Nutrition versus Kirkland Signature. ON gets praise for better taste, easy mixing, and strong value at 80 servings for $50, while Kirkland is described as decent but less flavorful and not as smooth. Flavor preferences lean toward chocolate and vanilla, with some favoring Ascent or Levels for cleaner ingredients and less artificial sweetness. A few caveats surface around water mixing, sweeteners, and lead concerns in protein powders, so the sale looks most appealing if taste and ingredient profile matter most.
Optimum Nutrition protein powder can taste better and mix more easily than Kirkland Signature during the savings period.
Costco's Optimum Nutrition deal can offer a strong per-serving price for stocking up across the year.
Costco's return and refund options can help reduce risk if a protein powder flavor does not work out.
Costco's price adjustment process can be handled through a self-service portal with responses taking a few days.
Protein powders can raise safety concerns because investigations have found concerning lead levels in many popular products.
Optimum Nutrition may not taste as good when mixed with other flavors, even if it tastes better by itself.
Kirkland Signature protein powder can taste worse and may mix less well for some buyers.
The promotion thread can be confusing because it is labeled a coupon book even though no coupons appear to be included.
Common Questions (6)
AI-generated summary based on comments from the community. Updated ago
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!
92 Comments
Sign up for a Slickdeals account to remove this ad.
They will both be the same price for the same weight during this promotion period.
I thought Kirkland's protein tasted kinda bad, and didn't mix as well. I returned the bag and never tried it again.
Edit: I just noticed you said you typically mix your protein powder with water -- I don't like ON in water, personally, so I always use milk. They recently added creamer to the Extreme Milk Chocolate formula to make it more palatable in water, but eh... YMMV on this one. Costco will refund you if you don't like it.
Sign up for a Slickdeals account to remove this ad.
Ascent is the best chocolate. $40 a bag when on sale. I haven't tried their vanilla yet. Their stuff doesn't taste like a protein powder.
Kirkland is 2nd best chocolate. Very chocolatey, but it's got the typical protein powder taste.
ON Chocolate is great too, don't get me wrong. I just like the other 2 better as they are more chocolatey and more complementary in flavor for my banana, PB fit, chocolate protein shake.
ON uses a cream like flavor to dampen the protein powder taste in its mixes so the powder by itself generally tastes better than others, but it doesn't taste as good when mixed with other flavors.
ON is the best vanilla (ice cream) though hands down. I love to use it as a base for protein ice cream.
If you're going to get into protein powder, be sure to get a proper blender:
https://www.costco.com/p/-/ninja-...?langId=-1
If you really want to up your game, get the ninja creamery and turn that shake into an ice cream instead. It feels so bizarre being forced to eat ice cream to hit my protein goal.
https://www.costco.com/p/-/ninja-...?langId=-1
AI:
"Yes, recent investigations, especially a major one by Consumer Reports (CR), found concerning levels of lead in many popular protein powders and shakes, with plant-based options often showing higher contamination. Lead enters these products from soil and can accumulate in plant ingredients like peas, rice, and hemp, with chocolate flavors sometimes having more than vanilla. While occasional use might be fine for adults, health experts suggest regular users, especially pregnant women and children, should limit or avoid high-lead products due to chronic exposure risks, as there are currently no strict FDA limits for lead in protein powders.
To find protein powders without heavy metals, look for brands with third-party testing (like NSF Certified for Sport or Clean Label Project), choose grass-fed dairy or organic/US-sourced plant proteins, and consider brands known for transparency like Transparent Labs, Ritual, Garden of Life, or Naked Nutrition, as plant-based powders often absorb more metals from soil, though specific products like Muscle Tech Mass Gainer and Amazonia RAW have shown low levels."
I didn't know this was a thing. Now I have something else to worry about.
Sign up for a Slickdeals account to remove this ad.
They will both be the same price for the same weight during this promotion period.
Ascent is #1 (best flavor alongside ingredients)
Levels / Kirkland at #2 (best ingredients, good flavor)
On (most amount of fillers. Look up the sweetner theyre using) is bottom of the list. Still popular from the marketing they used to do. I did go through 10lb of the gold standard in the last few years. Its okay in a pinch but if I had my pick (competitive price) id go in above order.
Join The Conversation
Share your experience with the Slickdeals community
Share information with the community. Please follow our Community Guidelines and be kind!