For extra sap storage, if I run out of 15l water containers, I use old protein supplement tubs (like the great big kind you get from Popeye's etc...a friend's son works out, so he saves them for me). I dig bunkers for them in the snowfall off of my house on the north side so the sap stays cool til I get to boiling it. I have used a garbage pail bought and used only for sap, but that is pressed into service only when absolutely necessary. I probably will stop using it.