Its a double walled hard plastic tankard with a silver glitter fluid between the walls to allow it to freeze and keep drinks cooler for longer.
Vintage Hard Plastic Yellow & White Set Hooks / Rack - Retro!
Vintage Disney Mickey Mouse Fridge Magnet 2.5” Hard Plastic by Monogram
Vintage Pepsi Bottle Novelty Hard Plastic Straw
Mrs Potts Teapot Disney Beauty and the Beast Hard Plastic Coin Piggy Bank
1960's - 1980's Vintage - Melamine / Hard Plastic / Nylon Utensil X4
Vintage Chevrolet Turret Top Helmet 1940's Fisher Body Super Rare Hard Plastic
