This is a beefy, sturdy, solid glass mug. If you are looking for a thick and heavy beer mug, these mugs are exactly what you want. Store them in the freezer. Pull out a mug and pour in a twelve ounce beer to drink it icy cold. On the other hand, if you think of the term 12 oz curls, you don't want this mug. It is over two pounds and definitely has some noticeable heft. Mugs arrived in a well padded box and un-scathed notwithstanding the fact that the box looked like it had been dropped, tossed, and beat up like airline luggage. The mugs look good and had no flaws.