Bredemeijer Double Wall Glass Tumbler For Coffee or Tea San Remo Design 400 ml Set of 2. At Bredemeijer, creating the perfect double wall glass mug is more than a goal, it really is a passion. They go above and beyond to ensure the tough, durable Borosilicate Glass they use is of the highest quality, shining with crystal-clear brilliance that simply outshines the competition! Every detail is carefully considered, all to bring you an unparalleled tea experience. With a simple easy hold shape these double-walled glasses will keep your drink hot or cold for longer. Available in 290 or 400 ml capacities. Made of extremely tough heat-resistant borosilicate glass. The glasses are dishwasher, microwave and freezer safe.