For years, protein shake drinkers were stuck with smelly plastic bottles. Ice Shaker came along and has brought you the solution to warm protein shakes and annoying metal balls. Ice Shaker's kitchen grade insulated stainless steel bottles are third party tested to keep your drinks cold for 24+ hours. The noise free twist on patented agitator will blend your protein powders but also works as a strainer to ensure a perfect pour every time. Invested in By Mark Cuban on ABC's Shark tank and created and used by the Gronkowski Brothers and athletes everywhere. 20oz Insulated Double Wall Stainless Steel Skinny bottle with measurement markings of 5oz, 10oz and 15oz. Keeps hot for over 6 hours and cold for over 24 hours! Twist on leak proof lid with easy open pop top Snap down handle for easy carrying. Silicone base for a soft landing. Kitchen Grade Premium Stainless Steel Cup That Does Not Absorb Odor Skinny Steel Design Looks Great and Fits All Standard Size Cup Holders. Sweat Proof Bottle, Preventing Cold Or Heat From Transferring To The Outside Of The Bottle.