Heatswell: The Expanding Coffee Cup Sleeve
This super thin beverage protection sleeve expands when the cup is filled with a hot liquid. Heatswell, as it’s called, can “grow” up to one inch and its texture has a knitted-on cloth towel feel. It’s non-toxic, recyclable and biodegradable so don’t be surprised to see this pop up at your favorite coffee shop sometime in the near future.
I think it’s a cool idea, but it looks like all sorts of creepy and it’s quite disgusting.