The ubiquitous and familiar maples (the genus Acer) have a watery sap that is used for water and to make maple syrup. The sap flows in late winter and early spring when night time temperatures are below freezing and the days are above freezing. The sap is slightly sweet and can be tapped by boring a hole in any maple tree (except the introduced Norway maple , Acer platanoides, which has milky sap). Drill the hole through the bark, about an inch and a half into the sapwood, angling the hole upward. Any reasonable sized drill bit can work, but many folks go with a 7/16-inch hole, which matches commercial sized metal tubes. Insert a tube (a.k.a. spile) and allow the sap to drip into a container. In the photo, I am using a naturally hollow Knotweed stalk. Use what you have. Bamboo, PVC pipe, and copper tubing all work. If you have trouble finding anything in the shed that will work as a spile, check out the Lehman's company.