Starbucks ONE Water 500ml Still

ONE Water 500ml Still costs £2.55 at Starbucks UK with 0 calories, no sugar and no salt. British spring water in a recycled plastic bottle, and the standard size most people pick up at the till.

It is the cheapest way into the fridge and the worst value per litre of the three waters. The 750ml bottle holds half as much again for around 40p more, so anyone who will finish a large bottle is better off reaching past this one. The 500ml earns its place when you want something that fits a cup holder or a coat pocket, which the taller bottle does not.

Prices run from £2.55 to £3.45 across the delivery partners. An app is where the markup on this item becomes hard to justify, since the same bottle at the counter is at the lower end of that range.

Still against sparkling is the other decision, and at Starbucks it costs nothing either way. The sparkling version is priced identically, so the choice is purely what you want to drink rather than what you want to spend. Still is the one to take if the bottle is going in a bag, since carbonation and a jostled bottle do not mix well.

Chilled is the other thing you are buying, and it matters more than it sounds. A bottle from the Starbucks fridge is cold enough to drink immediately, which a bottle from a shelf elsewhere is not. For a drink with no flavour to speak of, temperature is most of the experience.

Cap and label aside, the bottle is 100 percent recycled and recyclable, and the water carries gluten free, vegetarian and vegan labels. Stores will also fill a bottle from the tap free if you ask, which is the honest alternative when you are drinking it in the shop rather than carrying it away. The 750ml still is the value option at £3.00.