From the silent shaker mechanism and 35g built-in storage container to the 500ml double-wall insulated stainless steel body, this is the last shaker you'll ever want or need. BUILT-IN STORAGE: Store up to 35g of supplements in a container that locks into the base of your shaker STAINLESS STEEL BODY: The 500ml body keeps liquids cold for 12hrs and hot for 8hrs SILENT SHAKER: No noisy whisk ball rattling around when you're on the move LEAK-PROOF LID: Shake safe and keep your gym bag dry thanks to the built-in seals PERFECTLY SIZED: Fits in your rucksack pocket, bike bottle cage and any standard size cupholder EASY TO CLEAN: Rounded corners prevent unwanted residue building up