By popular demand, we took our top selling skinny tumblers and added our signature lid complete with an easy to carry, flip-up handle, easy open pop top and twist in agitator for breaking up powders.The 20oz Skinny Shaker features a silicone grip and silicone base. Of course, it still features a kitchen-grade, insulated stainless steel construction that will keep your drinks Ice cold for over 24 hours. It also has measurement markings of 5oz, 10oz and 15oz inside of the bottle so you know exactly how much you are drinking. Did we mention it fits into all standard size cup holders? It will even fit into your bike water bottle holder!