Quote Originally Posted by Andrew4x5 View Post
I use PET bottles (soda water bottles), which are pretty gas-proof and can be squeezed to exclude excess air. The ID11 stock solution that I make up keeps for at least four months at Australian temperatures (typically 20-30 degrees Centrigrade). From memory, ID11 stock solution didn't keep any longer in glass bottles.
Now that's very good news...I'll give it a try.