FunClucks
Crowing
I also put a very small hole in the side of the container right up under where the lid screws on to make sure the water will come out properly and not create a vacuum. You could also put a small hole in the lid. Not sure if that's an issue with the drinking cups or not, just something to keep in mind.The company I purchased the drinking cups from sent me an extra one, so I can use it on a smaller container as per your suggestion!
Thanks.