A water bottle that filters the liquid as you drink it, Bobble bottles are available in a wide variety of colours, sizes and purposes.

The classic bobble has a clear cap and is see-through in colour so that you can watch the replaceable carbon filter ridding of any chlorine and organic contaminants in the water. New varieties of the Bobble include coloured bottles, large carry caps and a sports bottle design.

To get your hands on one check out the options on House of Fraser, John Lewis and Argos – prices start from £6.99.