Heatswell: If Tetsuo Was a Coffee Cup Sleeve

Genius: a cup sleeve that expands via endothermic reaction when the cup is filled with hot liquid, insulating your hot coffee and keeping your hand from getting roasted. Utterly horrifying: the end of this video. [Heatswell]

Share This Story

Get our newsletter

DISCUSSION

bsbaldwin
Bs Baldwin

I could use this instead, and I can reuse it over and over again.