Imitating the charm of raw materials and natural fibers that can be found in the world's most picturesque forests, the Wood Collection, featured in a smooth matte finish, resembles mixed distressed woods. High-Grade 18/8 Stainless Steel. BPA-free. Triple-Walled for maximum insulation, leaving no condensation on the exterior. Stays cold for 24 Hours, Keeps hot for 12 Hours.