Ever wonder how to tell whether that jar in the back of the fridge has become a science fair project without actually (shudder) opening it?

Timestrips to the rescue! These gadgets use capillary action to draw a liquid across the scale at a known rate to provide a handy visual use-by indicator. There are professional versions of these used for tracking in commercial kitches, and Nestle is going to bring them out on one of their consumer products later this year.