Greetings,(posted 8892 days ago)I'd like to add to the previous post. Proctectan (distributed through JOBO in the U.S.A.) and available from them, B&H and others, is an inert gas, with a density greater than air. When sprayed into a partially filled bottle it displaces the air (oxygen) and protects the solution from oxidization.
Another good source for bottles are very clean, plastic soda pop bottles. Make sure you clean them well and only use soda, or carbonated liquid bottles; these contain a laminated vapor barrier which will keep air out. Instead of using Proctectan, or breathing into the bottle, you could squeeze the bottle until the level of the solution rises to the top.
Regards,