water bottle?

hi my DS wont drink water out of a sipper cup but will out of a bottle.
My question is... can he use the same bottle all day? Or should I wash it after every use? At the moment he has water about 4 times a day, after meals mostly but I try him in the arvo cos it has been hot! This means I am washing a lot of bottles every day:) Its driving me nuts.
If it was a sipper cup I would probably just change the water not wash the cup.
I guess I just want to know if its hygenic or not!
Any help would be great :)
Take care everyone
xox

I would assume if it is just water then it is safe to use the same bottle all day. I doubt it would be any different to a sippy cup with a silicone teat. If you're worried maybe store it in the fridge between uses. :)

I was gonna suggest exactly what TRISH mention as that is exactly what I do :dance:

... My daughter has never been ill from it ;)

I let Claire have the same bottle all day. She actually uses one of those cups with the straw. I just make sure I wash it at the end of the day as it does get a bit grotty sometimes. I think its fine to use it all day.

I'd think its fine not to wash it every time. Maybe you should try different types of cup - DS didn't 'get' the hard spouted cups until after he turned one, but he could drink from a straw cup and a soft spouted one at about 7 -8 months.