This is one of my favorite designs ever. It’s a quite sturdy plastic stool that folds out in about 3 seconds. Quite ingeniously, the carrying handle pops out when folded back up. When living in my tiny New York apartment, it always amused me whenever I put it back in its storage place; the 4 inch gap in between the wall and the refrigerator. It supports up to 300 lbs and at $29, is well worth the price.
Dimensions: 21″ x 4″ x 15.25″