I love the doubled walled glasses,  however, these are the exception, really, they are very big on the outside and are actually very hard to hold.  Some one with smaller hands would not be able to handle them.  I thought with little indent they would be perfect, and that is the actual saving grace, as without this, you would not be able to hold them or wash them, as they must be washed by hand.  would I recommend them, no. I bought 6 boxes, thinking they would be perfect, but I do thinking that I will be return a couple of the boxes.  AS WELL,  they 16 ounces, and in theory this is correct, but you make a cup of coffee and have 16 oz, you can not move the cup as it is full to the brim. Again, for the price, it is a steal, but I would not recommend them. they are just to hard to handle.