Swap single-use cups for a reusable, stylish and compact travel mug to keep tea or coffee hot or smoothies and chilled drinks cold on your home office desk or morning commute. Chilly's Series 2 travel cups come with a rotating lock mechanism for secure sipping and a non-slip silicone base. 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. Good to know: Chilly's Series 2 coffee cups have an innovative twist mechanism that creates a very tight seal. This prevents leaks but it's not fully leak-proof at very high temperatures or if the cup is fully inverted or shaken.