Innovative shaker balls: Silicone mixing balls provide quiet and efficient blending, are easy to clean, and resistant to damage. A plastic mixing element offers fast shaking. You can choose which shaker to use for different occasions and needs. Both options ensure all powdered ingredients mix smoothly with no lumps. Say goodbye to smelly plastic bottles: Traditional plastic shaker bottles can develop odors and are hard to clean. This bottle uses kitchengrade stainless steel that does not absorb odors or stains, helping reduce plastic use and minimizing microplastic exposure. Leakproof and shatterproof: Features a safe, leakproof twiston lid with an airtight seal to prevent leakage. The lid will not burst open if dropped. protein: Made from quality material, strong and durable. Stainless steel shaker with two mixing elements ensures all powdered additions mix smoothly, making it ideal for protein shakes, protein drinks, and preworkout drinks. Use scenarios: At the gym or fitness center for postworkout or preworkout shakes While traveling or commuting for quick protein drinks on the go Outdoors during hiking or cycling where durability and leakproof design are beneficial