Here's The Science Behind This Un-Spillable Cup
Price: $ 6.99
4.5(745)
Unbox Therapy took a hard look (and a few swings) at a cup that claims to be un-spillable. Maybe the right word is un-tippable though, because he takes some pretty aggressive swings at this cool device and can't get it to fall over. It's a powerful suction/air-tight seal system.
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