A bomb shaped piggy bank manufacturedby TOMY Co. guarantees savings per day. When a lazy user fails to insert coinage by day's end, the bank shakes and whines until the user feeds it coins. In the end, the bomb "explodes," opening its skull-marked door and scattering all its the contents, that is if there are any, onto the floor. This product, selling at around $27 will be one of many piggy bank innovations in the Japanese market.  At the start of January, Japan's piggy bank market will explode into a virtual gold mine as the masses there often make saving money a common New Year's resolution. Last year, TOMY Co. launched a product with comic characters that aged according to the amount of coins inside. Oh those Japanese.