It's called the "Euphori-Lock" and after receiving the idea from a fan, Ben & Jerry's created it! The combination lock, which will be available for purchase soon, allows you to lock your fave pint from your nibbling roommate or snacky boyfriend. (Though, anyone who really wanted some ice cream could clearly just saw open the bottom half of the pint, right?)
But, I think there's a better use for this gadget: To lock yourself out of it! Have a serving, then to keep yourself from over-indulging, lock the pint and give a friend the combo. Seems like a great way to keep yourself from falling victim to late-night cravings, right?