40 Vintage Kitchen Gadgets From The 50s, 60s and 70s
16.Gelatin molds

The jiggling favorite of the 70s didn't just get there by itself. The vintage kitchen gelatin molds played a big part.
Gelatin molds were metal, often tin or aluminum, that you would pour your liquid gelatin dessert into and let it cool in the mold. Un-molding the gelatin was an event in itself and led to people wanting to test is jiggle.