Glass Thermos Ultra Clear Spill-proof Strong Double-wall 3-Piece Borrosilicate Glass Tea Tumbler with Strainer Made of ultra clear borosilicate glass (not plastic), unlike the plastic tumbler, this one is good for cold drink or hot drink. No worry of BPA or plastic taste Unique double wall structure keeps hot drink hot and cold drink cold. Removable stainless steel strainer keeps loose tea in bottle. Spill proof lid made of ABS engineering plastic, no BPA worry. Perfect to use in home, office or car. Glass body is dishwasher and microwave safe. Wide mouth makes clean-up easy. All-in-one tea infuser & travel mug.