I've been using this for about a month. My previous waterer hung and due to the weight if the water, the tub became misshapen so the lid would never stay on securely. This caused dirty water, algae, and evaporation. With this Rent a Coop design, with hanging strap that I purchased separately on Amazon, the lid stays securely in place and its easy and clean to pull out the plug, stick a hose in it and refill. The triangular cap that sits on the lid does prevent the chickens from sitting on the top as I'm seeing no evidence that they're sitting up there. I was worried that it had a smaller capacity than they largest typical plastic waterer, but I am actually refilling less. Possibly due to spillage and evaporation. My chickens took to drinking out of the little cups with no issue.