Collapsible water container

Anyone have recommendations on a large water container? I’d use it for cabin camping (park cabins no running water) and potentially the Bwca, so
Collapsable or light but sturdy are priorities. I’d use os to keep clean water around for hand washing, brush teeth, clean dishes, etc.

I’d make sure it was BPA free. The option I’ve used is a bag from boxed wine. Check REI

Thinking either one or likely 2 units that get to about 6 gallons total.