I ordered a couple of mini cup drinkers from Fleming Outdoors. I have seen them for sale multiple places but could not find any reviews or people who have used them. They attach to any container and are self filling. Has anyone tried these? If so, what do you like/dislike about them. They seem great and have been out for years, but if they are why does no one have them? I plan on giving them a test run before I commit to using them in the coop. I will post a review as soon as I decide if I love or hate them.