Double wall made of 18/8 stainless steel (304) Isothermal anti-burn design Capacity: 12.85 fl.oz / 0.38 L Weight: 9 oz / Dimensions: Ø 3.3" x 4.4" Rust and dishwasher resistant Mouth-opening lid with removable seal Solvent-free laser marking BPA-free (bisphenol A)