Description
Double wall insulated to keep drinks cold for up to 8 hours and also keeps drinks hot for up to several hours • matching slider lid is provided for drinking on the go (except for 16oz short tumbler) • BPA free and California prop 65/FDA tested • base and walls of the tumblers are thicker than competing brands making them ~15% heavier and feel more like glass than plastic • insulate longer by approximately 5% due to thicker walls.