ChayWillow 316 Stainless Steel Insulated Protein Shaker Bottle | Leak-Proof Flip Lid, Mixing Ball Included, OZ & ML Markers, Wide-Mouth Opening, Double-Wall Vacuum

316 STAINLESS STEEL CONSTRUCTION: Made from premium surgical-grade 316 double-wall vacuum insulated stainless steel, this shaker bottle offers superior corrosion and high-temperature resistance, keeps drinks hot or cold longer, and stays sweat-free and cool-to-touch on the outside. EFFORTLESS MIXING: Includes a 304 stainless steel mixing ball that blends protein powder, pre-workout, matcha, meal replacement, and other supplement powders into smooth, lump-free drinks with just a quick shake. DUAL MEASUREMENT MARKERS & WIDE MOUTH: Built-in OZ and ML embossed markers on the inner wall allow precise portion tracking, while the 3.54-inch wide-mouth opening makes thorough cleaning easy with no hidden residue. LEAK-PROOF FLIP-TOP LID: Features a mother-child flip-top lid with 360-degree leak-proof sealing that audibly clicks shut, ensuring zero spills even during vigorous shaking, plus an integrated carry loop and non-slip grip body for easy transport. VERSATILE FITNESS ESSENTIAL: Perfect for protein shakes, smoothies, iced coffee, and daily hydration, making it an ideal companion for gym workouts, hiking, camping, commuting, and travel.