The award-winning design features double-walled insulation to keep drinks hot or cold, antimicrobial drinking surfaces, a twist-close mechanism, and a soft rubber base for a silent put down. Using advanced double-wall vacuum technology, each cup is made of powder-coated high-grade stainless steel to keep your drink at the right temperature for longer and to preserve the flavour and freshness of its contents. It can keep drinks hot for up to four hours or cold for up to six hours. Specifications Size: 340ml Colour: Brighton Blossom Care Instructions Hand wash only.