When the mains water goes off, the problem is rarely finding water — it is having somewhere clean to put it. A burst main, a frozen pipe or a boil-water notice can leave a UK household needing drinking, cooking and washing water at a few hours' notice, and the guidance from water companies is to keep roughly 10 litres per person per day put by. Empty milk bottles do at a push, but a proper food-grade container you can fill, seal, stack and carry is the difference between a tidy plan and a kitchen full of leaking jugs.
The picks below are split by the job rather than ranked, because most homes want more than one. For the store cupboard, a food-grade jerry can with a tamper-evident cap keeps water clean for months and stacks out of the way; the TIHOOK 22-litre carrier with a tap is the one to fill and stand on the worktop so the family can draw water without lifting anything heavy. For a grab bag or the car, the Colapz collapsible pack flat empty and take up almost no space until you need them. If a storm or supply warning gives you notice, the WaterBOB turns a clean bath into around 100 litres of sealed drinking water — far more than any jerry can, filled in minutes before the pressure drops. And for everyday carry and day trips, a rugged wide-mouth Nalgene is the personal bottle that survives being dropped and takes a purification tablet without complaint. All are BPA-free food-grade plastics; none of them treat water, so pair them with boiling or purification tablets whenever a notice says the supply is not safe to drink.
