I got Ozeri Serafino Double Wall Insulated Glasses in the mail to review and they hold 12 oz. and can be used for hot or cold drinks; how awesome is that? Now instead for buying glasses for both you only need one which can be a money saver. I love the design of the glasses as they are heat and shatter resistant made with borosilicate but when you look at them and see the bottom it almost looks like it rounds without going all the way to the bottom of the outside glass. So I tried these with both hot and cold drinks and with the hot my hand stays cool which is nice and the cool drinks stay comfortable as well without condensation other glasses produce. To learn more visit http://www.amazon.com/Ozeri-
Disclaimer: I was in no way compensated for this review and this is solely my own opinion which may differ from yours.