In the summertime the bulk of my barn chores is keeping waterers full and clean. A couple weeks ago I drove down to the coast and picked up some 58 gallon food grade drums that were used to ship olives from Spain to the US via ship. I brought them home - 6 was a super tight squeeze in my Excursion. They where bigger than I expected. I had intended to use them all as rain barrels but this past week I was looking at them and thinking they would make a great water reservoir for the chicken barn. Two of them could be rigged up to supply water to all the pens fairly easily. The barrels are very heavy grade plastic type drums. I am wondering if a stock tank heater like the one made for the rubbermaid stock tanks would help keep the water flowing in winter if the pipes are wrapped in the heater tape for super cold climates. I am fully capable of running pvc lines. I know I will need a pressure reducer . I am curious as to which drink cups you all might use and if you like the style you have or would go with something else if you had the option of changing. I was thinking of using 3 of these drink cups in each pen and 8 or 9 in my main layer house. Any and all recommendations would be great.