With an "real" Ayahuasca made of Psychotria & B. Caapi it´s not necessary just fill the ayahuasca into a plastic bottle until it`s COMPLETLY filled, so there is no significant space for air, close the bottle and you can store your ayahuasca about 12 month, or even more without any cooling. Thats how they do it in Brazilian Ayahuasca churches. I guess with mimosa & syrian rue it`s the same. The thing is after a while the stuff gets fermented so you have to open it sometimes that the pressure can leave, otherwise you open it after 12 month an the whole stuff runs out of the bottle ! Or you put it in the refrigerator this slows the fermentation. If you drink something and the bottle is still half filled, push the bottle until the liquids reaches again the top of the bottle so it`s completly filled, this prevents fungus (just in the case you want to store it without cooling). If you store it in the refrigerator it might be not necessary!