The cups are made from hand-blown borosilicate glass and complemented with the premium grade silicone band and lids. The beauty of glass is that it never taints, it is dishwasher and microwave safe and just looks nice.
The cups feel great in the hand and are super comfortable to hold and the silicone band helps keep hands protected from the hot glass. The lid is just the right shape to make drinking a breeze and there is no nose crushing to get the last bit if the drink out of the cup.