Replace them for free......

Yes I said FREE

[quote]
QUESTION    I need replacement parts for my Nurser System (rings, caps, sealing discs, etc.)? I can't find them for sale anywhere.

ANSWER  Parts for our system are occasionally lost. These parts are not sold separately in stores due to the limited availability of shelf space available. We would be happy to provide a limited quantity of complimentary parts if you contact us at 1-888-310-4290.
[/quote]

Taken directly from the playtex web site.
So if you use any type of playtex bottle and are missing parts for it, call that 800 number and get them for FREE.

EDITED To add that you can purchase them at www . playtexstore . com