To put a bag on a bag holder, remove the inner ring. Place the top of the bag inside the ring so it is about 2 inches above the ring. Fold the bag completely over the ring and then tuck about an inch of the bag back up under the ring. Then place the ring back into the holder and pull down on the bag firmly to make sure that the ring has been seated in the v-notches of the holder. Now your bag holder is ready for the tree. Slide the holder’s opening over the spout and wait for the sap to flow.
Sap bags are designed to be replaced every year. It is a good idea to have some extra bags just in case something puts a whole in one or two. Sap saks will hold about 4 gallons of sap.