40oz Double Walled Stainless Steel Leak-Proof Tumbler Superior Insulation: Keep your drinks hot for up to 12 hours or cold for up to 24 hours with the double-walled, vacuum-insulated stainless steel design. Large Capacity: With a 40oz capacity, this tumbler is perfect for staying hydrated throughout the day, whether at the office, gym, or on the go. Leak-Proof Lid: Designed with a secure, leak-proof lid to prevent spills and ensure safe transportation, perfect for travel or commuting. Durable & Rust-Resistant: Made from premium stainless steel, this tumbler is rust-resistant and built to withstand daily use while maintaining its sleek appearance. Eco-Friendly & BPA-Free: Enjoy your beverages with confidence knowing this tumbler is made from eco-friendly materials and is BPA-free for safe, healthy drinking.