They work WAY better than the cups! Nothing to clean. Plus the ladies figured it out pretty quick!
Discussion
what are they called, and where'd you find em?
Cyrading 6pcs Chicken Nipple... https://www.amazon.com/dp/B0CGDPCRQM?ref=ppx_pop_mob_ap_share
I bought the nipples from Amazon but pieced it together with plumbing from the hardware store. Let me know if you need more details on how to build it.