【SAY GOODBYE TO SMELLY PLASTIC BOTTLES】Traditional plastic shaker bottles easily become smelly and are tough to clean. Metal shaker bottles are made from premium, kitchen-grade stainless steel that will not absorb odors or stains, and reduce your plastic use and microplastic exposure. 【INNOVATIVE SHAKER BALLS】 The Innovation silicone mixing ball is quiet and efficient, without noise, easy to clean, and not easily damaged. The plastic mixing ball is quick and efficient to shake. You can choose which shaker ball to use according to different occasions and needs. 2 shaker balls ensure that all powdered additions are mixed up smoothly without lumps. 【LEAKPROOF / SHATTERPROOF SHAKER BOTTLE】Protein shaker bottle features a safe, leak-proof twist-on lid that ensures an airtight seal and no leakage. The lid won't burst open when dropped, no more accidental leaking/spilling leaving a mess and ruining your day. If you find that it leaks during use, please tighten the cap, it may not be tightened to cause leakage. 【EASY TO USE AND CLEAN】Making health visible! Scale engraved on the visible window to adjust the water level as needed, and a wide mouth for easy adding of scoops and liquids. 700 ML shaker bottle has a comfortable rubber strap for easy carrying and has a BPA-free, 100% leak-proof twist-on lid that is easy to open but stays secure while shaking or drinking. （Cleaning instructions: Hand wash, do not put in the dishwasher, as it may cause leakage at the visible window.) 【PREMIUM PROTEIN SHAKER BOTTLE】Shaker bottle is made of food-grade material, which is strong, durable, and unbreakable. A stainless steel protein shaker bottle with 2 mixing balls will ensure that all powdered additions are mixed up smoothly without lumps, perfect for protein shakes, protein drinks, and pre-workout drinks.