I tried sea pearl sponges last week but I haven't found them a roaring success so far
I bought the regular size ones but, to be blunt, they were far too big. I had to cut them in half before they would fit (argh too much sharing) and I don't think I would recommend them for the heaviest days of your period to be honest. That's just what I have found though, other ladies may love them
. It also says on the packaging that you shouldn't really cut them so I think I might have boobed there.
I have never tried the beppys but might give them a go, people seem to like them! I've never seen either Beppys or Sea Pearls for sale in shops, only ever on line.