One of the Amazon Deals of the Day. Showing as an all-time low price on CCC. These are highly-rated bags that are often suggested as cheaper alternatives to the Maxpedition bags. I've seen several guys use these as "manly" diaper bags, which is actually what I plan to use it for!
Black & OD Green are discounted, too:
Black - $24.48 - https://www.amazon.com/UTG-Multi-...B002BJBIRW
OD Green - $24.48 - https://www.amazon.com/UTG-Multi-...B002BJBIT0