Ergonomic flip cap, secure screw-on lid, Hand-in-hand design, comfortable and portable, Large caliber, easy to clean. This shaker bottles capacity is 600ml, whether in hand or in a bag, very convenient, will not take up too much space.You can use it indoors or outdoors. Always within reach when you're ready to replenish and refuel. Pre-workout or post-workout, our shaker bottles are a must-have fitness accessory to have in your arsenal. Each one of these shaker bottles for protein mixes comes with a PP shaker ball, so there's no grit or lumps in your shake. Just like drinking a smoothie only your protein powder may help repair and rebuild your muscles.