That plastic Sistema water bottles stain easily?

[Pibplob]

My kids have one of the clear ones that came in the lunch boxes. One has stained an awful orangey colour from orange squash but my other kids is still clean and she has blackcurrent. Any ideas how to de stain them? They look awful when an orangey brown colour!!

Bicarb

Milton

We only ever have water in ours

I have bicarb in the house. How do I use it? Nix with water and leave for a bit? Or without water?

We have them. I find they go a bit stinky after a while. I end up bleaching them every couple of weeks to remove the smell.

Does bleaching them get rid of amstains too? What kind of bleach do you use?

Bio washing powder.

I gave up on them and bought a stainless steel bottle instead. Much better.

I use just supermarket own brand stuff. Little squirt in soapy hot water. Leave to soak for an hour.