Built-in stainless steel mixing ball, quickly shake well, get rid of protein powder lumps, and enjoy smooth and delicious drinks. Comfortable small mouth, fit mouth shape, smooth water. Pressure lid design, easy to use, built-in sealing silicone ring, 360? inverted without water leakage, no wet bag on the go. Cup mouth design is wide enough for easy cleaning, smooth cup mouth, more intimate. Good sealing, inverted without leakage, firmly locks every drop of water. Made of new PP material, BPA-free safe and healthy. Precise scale, and capacity are clearly visible. Lightweight design, can be held in one hand, always light load without burden. Measuring 6.5*2.56 inches, this custom plastic fitness shaker with graduated scale. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Tailored branding: Supports logo imprint and design personalization. Product Highlights: Portable, durable, practical for daily use.