(Photo: Reuben Gates)
Erika Zorzi and Matteo Sangalli of Matherly Studio call it the Josie Chair. They take their inspiration from the 1999 romantic comedy movie Never Been Kissed. The main character of that film, Josie Geller, had a terrible high school experience. She was socially ostracized, had no friends, and was always sitting alone at parties. Sitting in a solitary chair was a symbol of defeat.
Zorzi and Sangalli wanted sitting down to instead be a celebratory and victorious act. So they built this beechwood chair. The seat is held up in the back by strings. Sitting down pulls the strings out of pressurized confetti containers, which then spray up over the sitter.
-via Dornob
2) The pictured Party poppers are not "pressurized confetti containers", they are powered by a very small amount of Armstrong's Mix (a highly sensitive explosive) in the neck of the bottle-like shape.