Crystal Jellies® Collection Bumps pink dildo. This popular item from Doc Johnson’s Crystal Jellies assortment is a supple yet aggressive 6” (15.24cm) ribbed butt plug, made of Doc Johnsons revolutionary Sil-A-Gel anti-bacterial agent, which is also phthalate-free for your protection. This soft flexible material has a smooth tip for ease of entry. With its bubbled shaft you will enjoy the entry and the slow exit during the onset of an orgasm. So, relax and enjoy the realistic experience of a nice anal intrusion.