Where can i get a menstrual cup?

Where can i get a menstrual cup?
There are some that are reusable and some that can be but it's not recommended by the manufacturer (instead soft cups for example, the above poster linked to them).
Instead is disposable, can be worn during intercourse and people claim that it cannot be detected. Well I used to use them and I'll tell ya I didn't detect it, but my husband sure did! You can buy them online or at some drug stores. I personally loved the product, but I can't find it my area anymore (think I was the only one buying them, lol) and I don't shop online.
There is also a product called "The Keeper" It is meant for repeated use and can last up to 10 years before it needs replacing. It cannot be worn during intercourse, when you see the shape of it, you'll see why. It costs $35 http://www.keeper.com/
http://www.softcup.com/
6 for 3.49 plus S&H 14 for 5.99