This 6-pack of Basic Systems will reduce a watering job from over an hour to just a few minutes. They are so easy to set and fill that it can't be done wrong. Tree I.V. is the toughest watering system available above ground and is virtually unbreakable. If you've tried bags you know they can be destroyed instantly by sharp sticks and string trimmers. Tree I.V. can be moved out to the drip line of larger trees, promoting outward root development. Made in USA .