Double Wall Insulation: Keeps Beverages At Ideal Temperature | | Cupholder Friendly: 24 Ounce Capacity Measurements Marked Inside Vessel | | Shaker Ball Included | | Leakproof: Twist-On Lid Includes Handle Loop For Easy Carrying. Spout Pops Open For Easy Drinking Access. Compatible With Classic Tumbler Vessels | | Pat/Pat Pending | |