I ask the cashier or whoever to fill my water bottle and 99% of the time it's fine. This might not scale but eventually perhaps they'd just stick a tap outside

I ask the cashier or whoever to fill my water bottle and 99% of the time it's fine. This might not scale but eventually perhaps they'd just stick a tap outside or whatever. Or do it in the bathroom since potable water is fairly universal in the Western world. I don't expect others to do this because it seems there are huge numbers of irrationally squeamish individuals.