The arrangement (100) includes a sap collecting device (102) and a slide clamp (104). The sap collecting device (102) includes a tubing fixation portion (140) over which the free end of the flexible tubing (106) can be removably inserted with a frictional engagement. The slide clamp (104) includes an annular sleeve portion (180) that is slidingly insertable over the unexpanded outer diameter of the flexible tubing (106) and removably positionable proximate the free end of the flexible tubing (106), when the free end of the flexible tubing (106) is inserted over the tubing fixation portion (140), to constrict the free end in a withdrawal-resisting frictional engagement with the tubing fixation portion (140). The slide clamp (104) also includes a plug portion (182) having an outer peripheral wall surface (206) on which the free end of the flexible tubing (106) is removably insertable to prevent air and contaminants from entering.