product 1. Metal Shaker Bottle & BPA-FREE: The large protein shaker bottle made of food-grade 304 stainless steel, strong and durable, it is very easy to clean; BPA-FREE lid make sure Safe and Healthy use.2. Upgraded Protein Shaker Bottle with Storage Compartment: With the perfect shaker plus, you can store all you need for your protein drink in one shaker Come with a specialized compartment to hold protein powder, babys formula, seeds, and anything else you would like to add to your shaker; you can also use it to storage pills or snacks.3. Easy Measurements with Wire Whisk: With a big capacityScales on the outside flask wall for easy observation of the drink volume, makes mixing drinks easy; Come with a big and round stainless steel spring to help completely dissolve powder in water without caking; this metal shaker bottle will be your new favorite workout partner.4. Leak-Proof & Portable: Rotary opening lid for strong sealing and no leakage; Pull-to-open suction nozzle for Easy open, Easy close; Take this easy to carry protein bottle while gyming, hiking, biking, camping or just use it in the office; Enjoy your drink anytime.5.Perfect for Protein Shake and More: Multi-functional; Our water bottle shaker is more than a shaker, wide mouth allows you to add ice cubes easily, it is suitable for cold and hot beverages; it also can be used as a coffee cup, smoothie shaker, juice mixer, cocktail shaker bottle or daily water bottle, ect.