I saw a programme a few months ago about a woman who was using this sort of thing. It's a funny pair of domes that goes over your breasts right and sort of sucks?
She wore it religiously for months, but no avail. Temporary swelling and then they go down over the day. It also seemed to hurt her a lot with it rubbing and she had to keep putting them on again and again cause gaps appeared and she lost suction.
I think probably implants are the only way to get bigger breasts forever.