Review on RTIC Lowball Tumbler With Splash Proof Lid, 12 Oz, RTIC Ice, Insulated Travel Stainless Steel Coffee Mug, Sweat Proof, Keeps Hot & Cold Longer by Gina Moore

Let me say first, that I LOVE my 20 & 30oz. Rtic cooler cups! The 10oz are a bit of a dissapointment. They are a great size, but don't do the job the big ones do. I filled one with coffee, and took it to work on a warm day. It stayed hot for about 20 minutes, warm for an hour. In two hours, it was room temp or lower. Styrofoam cups perform better! I have filled it with ice water at night, put it on my nightstand, in the morning, no ice left, it was merely cool water.The 20/30 oz models keep ice overnight, or all day, and then some. These work for less than 8 hours. Only reason I can guess why is the height of the cup reduces keeping time.I will still use them for overnight on the nightstand, or for a mixed drink, as I like them to water down, but not for anything lengthy.