Double walled 18/8 (304) stainless steel Insulated anti-scalding 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 and removable seal Solvent-free laser marking Bisphenol A (BPA) free