This water cup is made of 304 stainless steel inside and 201 stainless steel outside and is vacuum insulated. Built-in silicone sealing ring, inverted no water leakage. Smooth the mouth of the cup with fine grinding, drinking water will not hurt the mouth. Non-slip stable bottom, quiet and smooth placement, not easy to dump. Portable design, easy to carry.Suitable for sports, fitness, school, home and other occasions. Measuring 26oz/35oz, this custom 20oz sports tumbler with carrying handle vacuum gradient. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization available: Print your logo or customize packaging and color schemes. Product Highlights: BPA-free, leak-proof, travel-friendly.