Bfilled Basic Wave (Seafoam) Did you know the anal area has such a high concentration of nerve endings that even the smallest plug can feel amazing? The Bfilled Basic Plus massaging plug was designed with this in mind. Expertly defined contours, a flared base, and 100% body safe (and soft) silicone keep play as exciting as it is safe. It's also a non-motorized plug, getting its vibes from a free-floating weight inside that delivers the most arousing rush. And because there are no batteries required, clean-up is fast and easy.