Individually, they keep condensation from a glass or bottle off your fine wood furniture while looking like wooden shuriken you can use to fend off a ninja attack. But thanks to a clever mathematical design, the coasters can be connected to form larger trivets that safely hold hot pots or serving trays. Too bad the $US70 price tag (for just 14 pieces) feels like a not-so-stealthy attack on our wallets. [Michiel Cornelissen via Core77]
Use These Interlocking Wooden Ninja Stars As Coasters, Trivets Or Weapons
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