Conception cap?

Have any of you ladies tried the conception cap? Or even heard of it? I just seen an advertisement for it and was curious...at this point I would be willing to try just about anything!

[JerzyGirlatHrt]

I actually did use that this month.  We bd'd first thing in the morning but were in a hurry to get out of the house so I couldn't lay in bed.  I didn't use whatever it is they're marketing, but I used "Instead" which I sometimes use for AF.  They come in a big box and considering how many you get they're relatively inexpensive.  I just like them because you can actually bd even when you have AF (as long as it's not insanely heavy obviously), but I used it in place of a conception cap this cycle.

[Tanker Chic]

I saw something that looked almost like a deep diaphram.  I think the man was supposed to fill it and then you insert it like a diaphram.  Is this the same as a conception cap?  

[kvk01]

Where can you buy the conception cap from. I been tryin for 19 months and 2 miscariages and 1 ectopic so would love to try this