The Hunky Junk Elong Wide Base Nipsuckers are capable of fitting different sized nipples. Four springy rings, and a wide base ensures powerful suction so these little suckers won't come off. In premium, durable and comfortable FlexTPR that is body safe, non toxic and phthalate free. Everyone likes it a bit wet and wild, but if you choose to lube, be sure that it is water based.