High performance double-wall vacuum insulation will keep drinks hot for 4 hours and iced for 20 hours so you can use the same tumbler for morning coffee which you can then rinse and fill with cold water. The interior is electropolished a safe and non-toxic process which doesn39t retain or impart flavours makes it easy to clean and is BPA-free. They are durable and shatterproof portable reusable and recyclable. The easy fit tumbler lid keeps splashing to a minimum and is dishwasher safe but is not leakproof. Currently available in 3 colours - shale black winter lake blue and bamboo leaf green. Size 159mm high x 90mm wide. Hand wash with soapy water. Dried on drinks can be removed with a bottle brush and for stubborn stains use diluted vinegar and bicarbonate of soda.Klean Kanteen make stainless steel containers with either BPA-free polypropylene caps or plastic-free lids steel and bamboo. This is a family-owned US company which is a B Corp a company certified to be for the benefit of all stakeholders not just shareholders. They introduced the first stainless steel BPA-free reusable water bottle in 2004 as they wanted a safe non-toxic alternative to plastic bottles.