I'll have to ask around and see what those are. The configuration has me a bit baffled. The valve on them hooks to a larger bottle presumably to fill these, but then I don't know what keeps the air in once they are filled. Unless that valve clamp comes off. Is there a mouthpiece on them? I can't tell from the pics.

I got $80 for my last one I sold on ebay free shipping, pristine, brand new hydro, new unused with all documents and original packaging, and get this; the only pink one they ever made. I sold it at Valentines day.

Send a pick of the head of one them so I can see the mechanism is complete and I'll ask around for you.