I've use gallon sized bags, small bags, and quart sized. As well as hard plastic bags that came in a travel kit.

Most airports I travel through continue to "Bark" that liquids and gels must be removed. ORD/DFW/STL/IAH.

They also say to remove the laptop, but I have a checkpoint friendly bag and don't. So the bottom line, if your bag is easily viewable on the x-ray, they may be allowing the liquids through.