Gift to your Mom because deserves to be recognized and appreciated for all she does. .: Materials: 100% stainless steel (body), 100% polypropylene (lid) .: BPA-free, twist-on lid .: Available in three sizes: 12oz (0.35 l), 18oz (0.53 l) and 32oz (0.95l) .: Double-wall stainless steel construction