A pretty basic set, Doc Johnson’s Crystal Jellies Anal Initiation Kit features all you need for your anal training's humble beginning. A good way to kick that adventure off is with the three-inch plug — nothing too crazy, just an introduction to the set. When you wish to step it up a notch, you still have the four- and five-inch available in your clear plastic clamshell package.
A very nice touch about this set is the functional strap-on factor. If you want to train with a partner, they can slide these into a standard O-Ring harness to change up the pace.The base does seem to have a suction effect, whether intended or not. No mention of that feature on the packaging but seems to stick to smooth surfaces.
All in all if you are looking to get into some butt stuff, this starter set will set you on your path.