vintage Deka plastic coffee mugs, ring handle cups in retro avocado green, orange, harvest gold

Six vintage melmac or heavy plastic cups in retro colors - cute everyday kitchenware, or for camping or the picnic basket. These are marked Deka Plastics, we think they're late 70s or early 80s vintage, though the colors are very 60s. The cups are 3 1/4" in height, all in very good clean condition showing little if any use.