Double wall 18/8 stainless steel construction. 16 oz. capacity. Durable rust-proof finish. Double wall insulation keeps drinks hot for 2.5h and cold or iced for 20h. Naturally BPA-free. Green screw-top, leak resistant flip lid. Green large grip handle with rubberized insert and stainless integrated D-ring for clipping to backpacks. Stable, wide stainless base. Dishwasher safe - easy to clean. Bulk packed. Color: Hammertone Green.