Prices checked 25 October 2026 across 330 UK retail listings of sports and electrolyte drinks: 301 market listings, 9 Boost 500ml retail comparisons and 20 tablet/powder price-per-serving comparisons. All prices in GBP; the comparison unit is one prepared 500ml bottle, benchmarked against Powerade Attack 500ml at Sainsbury's (£2.25).
A like-for-like isotonic bottle with added electrolytes, no mixing. £2.00/L versus Powerade's £4.50/L — a 56% saving per bottle — with 3.5g sugar/100ml against Powerade Attack's 9.5g.
One tablet in 350–500ml of water: about £0.25 per bottle, zero sugar, with sodium, potassium, magnesium and calcium salts. Aptonia at Decathlon (£4.99/20, sodium and magnesium) matches the price.
About £0.17 per 500ml, roughly 92% below the Powerade benchmark. Requires water and a minute of prep; for carbs as well as electrolytes, add a scoop-type powder such as Optimum Nutrition (£0.34/500ml).
Caveat: retail prices, promotions and availability vary by store, location and date; price-marked and wholesale listings may require trade accounts or multipack purchases. Tablets and powders need tap water and a bottle — only Boost is a grab-and-go swap.
| Product | Retailer | Pack price | Per 500ml | Notes | Source |
|---|---|---|---|---|---|
| Powerade 500ml Attack Sports Drink Bottle | Sainsbury's | £2.25 | £2.25 | Ready to drink · 9.5g sugar/100ml · sodium | sainsburys.co.uk |
| Boost Sport Mixed Berry 500ml | Morrisons | £1.00 | £1.00 | Ready to drink · isotonic · added electrolytes · 3.5g sugar/100ml | groceries.morrisons.com |
| Boost Sport Mixed Berry 500ml (price-marked 79p) | Eden Farm (wholesale) | £0.79 | £0.79 | Ready to drink · sodium citrate · 3.5g sugar/100ml | eden-farm.co.uk |
| Aptonia electrolyte 0-calorie tablets, lemon (20 tabs, 10L) | Decathlon | £4.99 | £0.25 | Mix with water · sodium and magnesium · sugar-free | decathlon.co.uk |
| Applied Nutrition Hydration Electrolyte Tablets Vimto (20 tabs) | Tesco | £5.00 | £0.25 | Mix with 350–500ml each · sodium, potassium, magnesium, calcium · zero sugar | tesco.com |
| High5 Zero Electrolyte Tablets x20, Tropical (15L) | Tesco (via Grocefully) | £5.00 | £0.17 | Mix with water · sodium, magnesium · sugar-free | grocefully.com |
| Optimum Nutrition Electrolyte Powder Forest Berries 264g (33 servings, 14.85L) | Tesco | £10.00 | £0.34 | Mix with water · sodium, potassium, calcium, magnesium | tesco.com |
Method: extracted UK retail listings of sports and electrolyte drinks — 301 market rows, 9 Boost 500ml comparisons and 20 tablet/powder comparisons — prices checked 25 October 2026. “Per 500ml” is pack price divided by prepared volume in 500ml units; the chart shows the five featured options and the table a representative subset. An implausible £0.14 Amazon High5 extraction was excluded.