This stainless steel bottle and straw top is ideal for transitioning from baby bottles. The two-piece silicone top can be used as a sippy or straw top. Includes One stainless steel single-walled mason jar Silicone Sippy Straw Top Removable Silicone Straw Plastic Ring & Cap Benefits: Single-wall stainless steel body - NOT double-wall and NOT insulated (lightweight for babies and toddlers - approx. 8oz with Sippy Straw, Plastic Ring and Cap attached) Flow controlled straw top to minimize mess Volume markings to 12 oz for daycare/bottle feeding compatibility Max capacity of 16 oz Easy-to-clean design—nowhere for mold to hide Dishwasher Safe Compatible with Mason Bottle Silicone Nipples and all other products Fits standard car cupholders STRAW MADE IN USA, STAINLESS JAR MADE IN CHINA