Exceptional Insulation: Double wall vacuum insulation keeps drinks hot for up to 9 hours and cold for up to 12 hours, making this 40 oz insulated tumbler flask perfect for long days, outdoor adventures, or travel. Premium Food Grade Materials: Crafted from high-quality food-grade stainless steel, this 40 oz tumbler flask ensures your beverages remain fresh, safe, and free from harmful chemicals. Convenient and Stylish Design: The Sun Ninja 40oz Tumbler is available in 3 colors and is equipped with an ergonomic handle for easy carrying and drinking on the go. This 40oz coffee tumbler is ideal for both indoor and outdoor activities.Convenient and Stylish Design: The Sun Ninja 40oz Tumbler is available in 3 colors and is equipped with an ergonomic handle for easy carrying and drinking on the go. This 40oz coffee tumbler is ideal for both indoor and outdoor activities. Leak-Proof & Easy to Use: The easy-open and close lid offers a secure, spill-resistant seal, making this flask one of the best tumblers for hot and cold drinks, whether you're hiking, camping, or commuting. Perfect for Big Thirsts: With its large 40oz capacity, this stainless steel tumbler flask holds plenty of your favorite beverages, making it ideal for outdoor enthusiasts, athletes, or anyone needing hydration on the go. Take hydration to the next level with our 40oz Stainless Steel Tumbler Flask with Handle, designed to keep your drinks perfectly hot or cold for extended periods. Whether you're tackling a long workday, heading out on an outdoor adventure, or need a trusty companion for travel, this 40 oz insulated tumbler has you covered. Featuring double wall vacuum insulation, it keeps your drinks hot for up to 9 hours or cold for up to 12 hours, so your coffee stays warm during cold mornings and your water remains ice-cold on hot afternoons. Crafted from premium food-grade stainless steel, this 40oz coffee tumbler flask is durable and ensures your beverages stay fresh and free from harmful chemicals. The convenient handle makes it easy to carry or drink on the move, while the secure, leak-resistant lid provides peace of mind whether you're on a hiking trail, at the gym, or commuting to work. This versatile 40oz stainless steel tumbler flask is perfect for hot and cold drinks alike, making it a must-have for outdoor enthusiasts, athletes, or anyone in need of extra hydration. It’s the ultimate tumbler for big thirsts and long days, combining practicality with style!