Fuel your workout and speed your recovery with the Corkcicle Protein Shaker. The leakproof lid has a built-in agitator that quickly mixes and smoothes powders. shakes. and greens to clump-free perfection. The lid also works as a fruit strainer for infused water. With a 30oz capacity. Protein Shaker can keep smoothies and shakes cold up to 12 hours. The flexible handle makes it easy to tote. and the silicone spout stays tucked in and clean until you flip it up to sip.