Double walled glasses exist, they are used for tea or frothy coffee. The glass is very thin though; the trade-off being that if it was regular thickness it wou

Double walled glasses exist, they are used for tea or frothy coffee. The glass is very thin though; the trade-off being that if it was regular thickness it would be very heavy and big relative to the contents - and your hands. This makes them even more likely to break! However, the brand Bodum do nice onces made from Borosilicate Glass.