Triple Insulation with Copper for Long-Lasting Temperature Control: Engineered to keep drinks cold for up to 18 hours and hot for 6 hours, this 40oz tumbler uses triple-layer insulation with a copper lining for superior performance. Sweat-Free & Durable Design: Enjoy a sweat-free exterior that stays dry even with icy drinks. The durable stainless steel construction is rust-proof, odor-resistant, and built for everyday use. Travel-Ready with Ergonomic Handle: With its comfortable handle and car cup holder-friendly base, this tumbler is perfect for long commutes, road trips, and outdoor adventures. Versatile, Spill-Resistant Dual-Function Lid: Switch between sipping directly or using the included straw with the spill-resistant dual-function lid. Designed for convenience, this tumbler adapts effortlessly to your lifestyle. Stylish, Eco-Friendly, & Gift-Ready: Available in a variety of vibrant colors and patterns, this tumbler is a practical yet stylish choice for yourself or a loved one. Its reusable design helps reduce waste, making it both functional and sustainable.