High-quality stainless steel water bottle with an eco-friendly bamboo exterior! VW Do Your Part graphic printed on bottle. 16 oz. Vacuum-sealed, Type 304 & Type 201 stainless steel. Copper lining for added insulating power. Removable infuser for holding fruit, or brewing loose leaf tea right in the bottle. Bamboo products have natural anti-microbial properties. Each bottle will feature the wood grain slightly differently.