At close of Chester Folk Festival this year, my hand maiden & manservant were packing up all Mr Happy's camping stuff.

Handmaiden found that the one gallon plastic springwater container he'd used for many's the long year had a ring of green mildew a quarter the way up it's interior & strongly suggested it be chucked.

Mr Happy acquiesced & is now seeking replacement.

BTW our large water bottle made of thick polythene (ex-GPO) is still in perfect order despite being over 20 years old.