Dr Riter’s ErgoChair is an ergonomic chair designed to help you improve your posture. The egg shaped “seat” part can be inflated and deflated to fit the individual user. It can also be removed to be used in stretching exercises. The whole thing looks like something Mork would sit in while waiting for Mindy to come home in her Jeep with Jonathan Winters.
Product page at Amazon: ErgoChair
SLEEKFORM Ergonomic Kneeling Chair, Adjustable Stool For Home and Office - Thick Comfortable Cushions