My efforts to store my limited range of chemicals in bottles without air has lead me to use plastic bottles used for fizzy drinks.
At present I have used these easily flattened bottles for my undiluted Ilford paper developer and stock solution ID11.
A 2ltr bottle will collapse to less than 300ml so giving airless storage.
Aside from safety issues (I always remove the original drinks label and re-label with clear signs for the product within....and store in a special dark & cool cabinet) is there a reason why this shouldn't be done? I'm thinking of possible reaction between the chemicals and the plastic used. Any problem with the bottle being clear (although stored in a dark cabinet)?