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 proof Up to 5 hours hot, 8 hours cold Lockable One handed opening and closing High-quality 18/8 stainless steel Fits in bike bottle cages and car cup holders Lid disassembles easily for thorough cleaning and is dishwasher safe BPA, BPS & BPF free