Retro 60s 70s tiki bar drinking glasses, raffiaware burlap / colored acrylic plastic

Unmarked 60s or 70s vintage acrylic plastic glasses with encased burlap, thermo-serv raffiaware style. This is a set of four 4" tall glasses, each glass a different jewel bright color. They're all in very nice condition, very little scratching or signs of use.