Double Wall & Vacuum Insulation - Double walled insulated not only keeps the drink warm for 6 hours or cold for 12 hours, but also provides a sweat-proof and condensation free cup exterior.The 30 ounce tumbler is good for storing any beverage such as wine, beer, water, juice, smoothies, cocktails, coffee, champagne, milk, etc.
Premium Material - Superior rust-free medical grade SUS316 stainless steel on inner wall and food grade 18/8 stainless steel on outer wall.BPA and lead free ensure no rust and better corrosion resistance.
Good Sealing Performance - This tumbler cup lid comes with 4 layers silicone sealing ring, silicone straw and drink hole for maximum splash-proof capability.
Ergonomic Design - Unique decagon cup body, narrow and tall design and 2.9in diameter non-slip silicone base for easy griping, designed for car cup holders.
2 Ways To Drink - You can choice a plastic straw to sip on your beverages casually or the flip lid to enjoy your drink safely. Ideal for indoors, outdoors, sports, traveling, camping, driving & office.