Why can't I get this meat bird watering thing to work right?

I need some advice here because I'm fumbling. These birds keep TIPPING the cups! I don't know what to do. It's incredibly frustrating.

[@LilClucker]

Thank you for choosing Lil'Clucker! We're glad to have you as part of our community. To help prevent the cups from being bumped into, we suggest adding some hardware cloth or any other barrier around the cups. This should provide a more secure setup and help keep everything in place. We hope this helps! If you have any questions or concerns, feel free to message us anytime. Best regards, The Lil'Clucker Team

[@Afarmsteadjourney]

It doesn't have a lid either, does it?