The South Florida sun is murder on those plastic gallon-sized waterers. I am frequently having to replace the white tops as they deteriorate & crack, rendering them useless. The other day I was wishing there were waterers made that size which used glass for the tops. Then I remembered an old glass storage jar I had in the barn. Although the mouth of the jar didn't mesh with the threads of the red bottom of the waterer, I can still use it. It's a bit of a challenge holding it together and inverting it with one neat smooth motion, but once it's in place it works great. I just have to make sure the edge of the jar is over the hole in the base, and it dispenses water just as needed. The glass makes it heavy enough that the birds (now chicks) can't knock it over. The white thing you see on top of the glass is a plastic jug I have suspended so that it hangs right over the waterer, keeping the chicks from jumping & sitting (and pooping) on the waterer. Does anyone make a big waterer with a glass top that screws on a base? Wouldn't it be a great idea to devise one that could be used with big wide-mouthed jars, the way those little bases can fit on a mason jar? Sorry folks, I didn't realize that the photo would disappear if I removed it from my uploads. This is new stuff for me, I'm a Wilma Flintstone trying to get along in a Jane Jetson world.