- Location
- London
not sure what you mean by single use.I agree,ethically I can't just ditch a plastic bottle & single use is also not for me.
My bottles made of whatever are years old.
If using plastic bottles I'd these days try to use clear ones so that you can see whatever might be festering in them.
recommended 1 litre bottle
https://www.merlincycles.com/zefal-magnum-bottle-1-litre-150768.html