My Mother is coming to stay with us on Sunday well she was 
anyway somewhere, somehow , she has it in her head that she can only drink bottled water.
This is despite having a water filter. This is despite us having just bought one for her visit!
When I lived in London, it was a must (for us) it did improve the flavour and after seeing the crud floating in the top (of the filter) it made sense.
Where we live in the Country our water is really nice, I've been 'lazy' about using one here.
My Mother likes having masses of these blasted bottles in the kitchen, just for drinking The filter is fine for tea/coffee.
Now, I forgot this silly rule that she binds all her visits with. I innocently thought the filter would work... for all water needs
Apparently not, as you have guessed it, she still wants a collection of Tesco value water all over the place
I'm not unreasonable am I? Its just bottled tap water right?
mother also claims a Doctor no less has told here to use it!
I know, it is a very boring question...I'm yawning as I type...however what is the opinion on MN please.
Mum has just slammed the phone down on me! 
After a typical " If you needed something I'd get it for you" poor me speech!