Smart Wallets Get Harder To Open As You Spend More
An MIT Media Lab team has developed a series of wallets that physically react when you electronically spend.
The wallets communicate with your bank via a bluetooth connection to your smartphone and come in three variants. The "Mother Bear" has a hinge that gets harder to open as your balance dwindles. The "Bumblebee" vibrates every time a transaction gets processed, with one vibration for debits, another for credits. And the "Peacock" swells and shrinks along with your account balance.
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