1.The heat resistant glass and double wall will keep cold drinks cold and hot drinks hot. 2.You can see the outline of a beer bottle in this unique double walled glass. 3.The glass can be decorated with decals.These can be on the inside glass and /or outer glass. 4.Made of high quality borosilicate glass with a 3.3 coefficient of expansion,characterized by good chemical stability,low material expansion,and high heat resistance.The instantaneous temperature exposure is from-20centigrade to 500centigrade. 5.Great for parties and having a few drinks with friends,but also great for everyday use.