Retro vintage thermoware type insulated plastic picnic tumblers, tropical colors

Set of six insultated plastic glasses, therm-o-ware style, marked only USA. These have a mod gold abstract design, and great 60s tropical style colors, melon, lemon yellow, avocado green.

They are 5" tall, and look nice and clean without much scratching... one glass has a crack to the clear plastic exterior.