These are basically little gu-style packets of booze. The official line:
Pocket Shot is a brand new way to enjoy your favorite hard liquor. No longer will you need to carry full size bottles. Gone are the breakable glass mini bottles. Now you can have it one shot at a time, any place, anywhere.
Each Pocket Shot is sealed in a near unbreakable, flexible, squishable, pocket stuffable pouch making them perfect for active activities, outdoor adventures, and glass restricting venues.