• Double-Wall Vacuum Insulation: This advanced thermal technology creates a vacuum seal between two layers of steel, keeping your favorite beverages ice cold for up to 30 hours and piping hot for up to 12 hours while preventing any external condensation. • 18/8 Food-Grade Stainless Steel: Built from premium kitchen-grade metal, this durable construction ensures your tumbler is rust-resistant, BPA-free, and prevents the transfer of odors or metallic flavors for a pure drinking experience. • Leak-Proof Straw Lid: Designed for ultimate convenience and portability, the secure lid and matching reusable straw provide a spill-proof seal that allows you to stay hydrated on the move without worrying about messy leaks. • Cupholder-Friendly Design: Featuring a sleek tapered base and an ergonomic integrated handle, this 25 oz tumbler is engineered to fit perfectly into most standard vehicle cup holders, making it the ideal companion for commutes and travel. • Product Care and Maintenance: To preserve the vibrant exterior finish and maintain the integrity of the vacuum seal for maximum product longevity, handwashing is highly recommended for this tumbler.

Diamondback Branding is not an authorized Hydro Flask partner.

All Hydro Flask products are modified after initial purchase and may void warranty.