Life Bank One Bottle Top
The Life Bank One is a little coin counter that you can screw onto the top of bottles, turning any empty bottle into a piggy bank. Or, uh, change bank. Unless it happens to be a pig bottle, in which case, yeah, piggy bank. Unfortunately, the thing only counts 1 yen coins, which means it's completely useless unless you live in Japan and only get 1 yen coins in change. And really, who doesn't?