Popay / Masahiko Inami, Kentaro Yasu (JP)
Popay is an instant paper craft that can be folded up in a microwave oven. The specially designed sheet is made from a combination of two materials, a heat-shrinkable sheet and a microwave-safe aluminum sheet. The aluminum sheet absorbs microwaves and provides heat energy to the heat-shrinkable sheet efficiently. The shrinking sheet then bends and folds the paper.
credit: Kentaru Yasu