Halfords 24-litre

Our pick of Halfords’ new line-up, this impressed in the chill test. It quickly got down to 18 degrees Celsius below ambient temperature, and after two hours was 20 deg C below. Plus, it has a decent-length cable with good storage, and made reasonable use of the space, squeezing in two 2.0-litre bottles. Makes sense at the current offer price of £49.99. 

Halfords  0845 762 6625  www.halfords.com