LEAKPROOF AND SHATTERPROOF design: A safe twiston lid provides an airtight seal and prevents leakage. The lid will not burst open when dropped, helping avoid spills and mess. SAY GOODBYE TO SMELLY PLASTIC BOTTLES: Built from kitchengrade stainless steel, this bottle does not absorb odors or stains. It helps keep smells away, is easy to clean, and reduces plastic use and microplastic exposure. INNOVATIVE SHAKER BALLS: Includes two options to suit different needs. The silicone mixing ball is quiet, efficient, and easy to clean, while the plastic mixing ball shakes quickly. You can choose which ball to use based on the occasion; both mix powders smoothly without lumps. PROTEIN BOTTLE: Made from quality, durable stainless steel. It is strong and unbreakable and comes with two mixing balls to ensure smooth blending of all powdered ingredients. Ideal for protein shakes, protein drinks, and preworkout beverages. USE SCENARIOS: Postworkout: Mix a protein shake quickly at the gym or home with minimal cleanup and no leaks. On the go: Take it in a bag during travel or commuting without worry of spills or odors transferring. Preworkout or daily routines: Prepare preworkout drinks or daily shakes at the office or outdoors, choosing the appropriate shaker ball for quiet mixing or fast blending.