A 340ml / 12 fl oz stainless steel vacuum insulated travel cup that is completely leak proof and will keep your drinks hot (or cold) for hours.100% leak proofUp to 5 hours hot, 8 hours coldLockableOne handed opening and closingHigh-quality 18/8 stainless steelFits in bike bottle cages and car cup holdersLid disassembles easily for thorough cleaning and is dishwasher safeBPA, BPS & BPF free