PVC water cup ?

Since my ball pythons keep tipping over their water dish and making a mess I am looking at going to a new system. I remeber reading somewhere that you can use pvc couplings adn insert a plastic portion cup or deli cup into it and they wont be able to tip it over. Does anyone know what size coupling to use and what size cup to insert?

I do that! I use 3" couplings and the little clear party cups that are only like 4 inches high. They fit perfect!

How does it not topple over Jess?

It weighs quite a bit. The PVC is heavy. Then again, my snakes are all babies, but I'm guessing with full water bowls it would be fine.
EDIT: maybe the cups are like 3" high. But I looked and they are 9oz solo cups. Came in a pack of 40.

I have using the ceramic/plastic dog/cat dishes from the dollar tree, so far so good. The only problem I have with the ceramic, is the hard water stains, so every other month or so i use clr on them.

My racks have ARS caging tubs, 70 series, the middle one:
http://www.arscaging.com/images/models/Tubsvlg.jpg
http://www.arscaging.com/arstubs.html

They are so sexy. I just stick a deli cup in the built in water dish, and voila! No spill.

Nice! How much are those?

I have never seen the PVC water cup ever before ,.
Please anyone share the pictures of PVC water cups here,.

Here is one of few pics I have with the pvc coupler in the picture, before cleaning her cage.

http://farm7.static.flickr.com/6200/...4417b4bc_z.jpg
IMG_6686 by muffywrx, on Flickr

The tubs are like $30 or something. It says on their site.