Fresh water and waste water containers

[iDixonn]

What size is suitable for 2 containers 1 for fresh water and 1 for waste to go under the sink? I know it depends on how often I am able to fill them up etc. Just need an idea of what other people have

 

[t0mb0]

Given the likely space under the sink, I would say the absolute max that will fit.

 

[Pete C]

13 litres for both here. Only 2 of us, but they last a couple of days, and a good compromise on size and weight when full.

Pete