It not very high tech, but I like it! Although, I think this would start an ice cream war at home.

For those times when you need to drop a not-so-subtle hint regarding your significant other’s snacking habits, consider the Ben & Jerry’s Pint Lock. An idea from one of their fans, you can also use this combination lock to keep the others in your household from polishing off the last of your Cherry Garcia, should the thieves in question not be familiar with the low tensile strength of soggy cardboard. Available now, directly from Ben & Jerry’s.
($5.50, in stock.)