The description and information on the box states that this margarita glass holds 12 ounces. That may be a stretch of the truth. Perhaps the entire glass INCLUDING the outer walled section that is filled with the gel holds 12 ounces -- but there is no way you will get a 12 ounce drink in this glass! I filled the glass with water up to the rim and poured it into a measuring cup. The max amount this glass holds is 8 ounces. I subtracted 1 star for mis-information in the description.

However, the claim that the glass will keep you drink cool for hours IS true! I filled the frozen glass with water and ice cubes (my "test margarita") and timed how long the gel would stay frozen and the drink remain cold. I still had gel "ice" frozen inside the wall of the glass, and the ice cubes I placed in the water were still frozen at the 2.5 hours mark. I then tested an "on-the-rocks" margarita, followed by a frozen drink. The on-the-rocks still had ice after 2.5 hours and was not diluted. The frozen margarita did melt a little bit on the top after about 1.5 hours, but the portion down within the walls of the iglass was still in the "slushy" frozen state.

The glasses are easy to hold, and they are a bit cold, but not as cold as holding a glass glass. The little rubber ring at the base does help protect from the cold glass somewhat - but it's pretty small. After a margarita or two, you should not feel any pain anyway! :)

Despite the fact that the glass holds less that advertised, I am keeping them. They are sturdy and can be stacked for storage. I like the fact that they are acrylic, too!

Man, my Dad loves these! They were an Amazon deal impulse purchase, a "Present-For-No-Reason Day" gift. He was initially skeptical but dutifully set them upside-down (as the instructions tell you to) in the freezer. He's hooked now. Loves them for cocktails, frozen drinks, ice cream, anything he wants to enjoy cold. He's had them for about a year already, and they are holding up well. He uses them, hand washes them, and puts them right back in the freezer to await his next frosty craving.

These are adorable, durable, and fun. I love the silicone grip. The cup is filled with a gel-like fluid and stays frozen long. I bought them for my 95-year-old client and myself to enjoy his non-alcohol Margarita.

I wasn't sure how these would work for our cocktail hour by the pool, but these glasses stay cold a remarkably long time and they are safe around pools/hot tubs!

Every year our family does a gift card exchange, and you have to pair it with an item that describes what the gift card was for - this was perfect!