Plastic
Like any food-stuffs, bottled water should be stored in a cool, dark place away from noxious chemicals or even strong-smelling foods such as curry powder. It is important that retailers and consumers understand the need for sensible storage. The matter was highlighted by a BBC Working Lunch Programme about an incident involving a brand of French water whereby a few bottles of the water became tainted after being in contact with chemicals. Although this is very rare it is, under extreme conditions, a possibility. In some instances it is possible for odour to permeate plastic (PET) packaging and whilst this is unlikely to cause health problems it can affect the taste of the water. Of course, such tainting can occur with any PET packaged product (such as soft drinks) but is more obvious in water due to its normally neutral taste. Some Members of British Bottled Water Producers who sell water in plastic containers are therefore adding simple storage recommendations to their packs stating: Store in a clean cool dry place away from sunlight, strong odours and chemicals.

Glass
Whilst the issue of chemical tainting does not affect water in glass bottles, care should be taken with glass containers which should not be kept in temperatures below freezing. When water freezes it expands and could crack the bottle. Glass bottles containing water should be stored in a clean, cool dry place away from sunlight.

Also, don't put ice-cold glass bottles into hot water or vice versa as the glass could crack.