The Kodak RA/RT 10 liter concentrates don't need to be stored in a fridge, just mix the qty you need for the processor, flush the air out of the factory bottles with some nitrogen, argon or butane and reseal. The opened concentrates will easily keep a year if you remove the air. The mixed solutions will keep 5 months in a PETE soda bottle if made with distilled water, at least mine have. See