“Ooh… sorry, I don’t have any cash on me… [cue regretful face]” will no longer be an acceptable policy if this newfangled tip jar gadgetry catches on. DipJar is pretty simple — a credit-card scanner that sits upright and resembles a traditional tip jar. Stick youur card in and leave a tip wherever it’s deserved. Time to start dreaming up alternate excuses, ye stingy folks. [More]