I'm worried about germies that might lurk and grow in my children's drink bottles. They only ever have water in them but they sit around all day and although I try and empty them at night it doesn't always happen. I obviously can't clean the straw but I've got metal ones that I can get a brush inside but I still can't properly clean around all the small parts of the top or the straw. We have on occasions found a little scum inside drink bottles which immediately then got thrown out because we simply could not clean it properly.
Can you get replacement straws anywhere?
How do you ensure the hygiene of your children's drink bottles?