Try the website for the Instead Cups...www.softcup.com ...for more info.

From the website:

Q: Does the INSTEAD® Softcup® have any latex?

A: No, there is absolutely no latex used anywhere in INSTEAD® Softcup®. The INSTEAD® Softcup® reservoir is made of Polyethylene.

I've never managed to find these, but I'm so happy with the diva, I haven't gone looking either...

Carrie Anne