high density polyethylene is the plastic of choice for so many things. The drought in our area does not at this time look like it is going to end, as there has not been that much snow or train to adequately rehydrate the soil. So....., am getting ready to invest in a water storage tank, to be used to drip irrigate our trees. We almost bought the setup last summer, but I don't want to loose any more trees, and we will want the tank anyway, for when the pole barn is built and we collect rainwater from the roof. Figuring out the drip tape and a wagon to haul the tank will be next. Several sources for the tanks, even Nelson's had some selection last summer. I may stop in next trip and see what they have, and if I can order one.