Not saying it does not exist, but we do not know of it. Tempered glass would NOT hold up to heat and cold transitions, so it would not make a good smoking pipe. Tempered glass is designed to break into small glass parts that are harder to cut you.
Not saying it does not exist, but we do not know of it. Tempered glass would NOT hold up to heat and cold transitions, so it would not make a good smoking pipe. Tempered glass is designed to break into small glass parts that are harder to cut you.