DUO is an innovative ergonomic handle that attaches to everyday mugs, glasses and bottles, increasing grip and stability when drinking. It is a great alternative to 2 handled mugs or beakers, allowing everyone to use the same mugs as family and friends - ideal for using in cafes and restaurants. DUO's wraparound style protects hands and fingers from hot mug surfaces, whilst its unique clip on design makes it easy to attach and detach without fuss. Wash in warm water.