Sparkling water

Seal the bottle straight away and keep it upright in the fridge; cold water holds its fizz better. A tight-fitting cap helps more than pouring the leftover water into a wide jug.

Yes. Fold it in just before cooking so the bubbles remain, then cook the pancakes in a lightly greased pan over medium heat; the batter may make them lighter.

Usually: both add bubbles without sugar, but soda water may contain added minerals such as bicarbonate or sodium, which can give it a slightly different taste. For a simple spritz, either works with citrus and a measure of cordial or juice.

Its clean, bubbly taste works well with rich or salty food, such as fried fish, crisps and cheese. Add a slice of lemon, lime or cucumber when you want a little aroma without making a sweet drink.

It is water with dissolved carbon dioxide, either naturally present at the source or added under pressure. The gas forms bubbles when you open the bottle and escapes faster if the water is warm or left uncovered.

Plain sparkling water has no sugar; flavoured versions may contain sugar or sweeteners, so distinguish them from water flavoured only with a slice of fruit or herbs.