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The Rear Assets Rainbow Trainer Kit from NS Novelties is a three-piece anal training kit of smooth metal plugs in graduated sizes, each finished in iridescent rainbow colours with a glam stone set into the base. It's made for people who want to build up slowly, one size at a time, and who like their toys to look as good as they feel. The small plug is gentle enough for a first try; the large one gives you somewhere to work toward.
The idea is simple: start with the smallest plug until it feels easy and relaxed, then move up. Each step stretches you a little more than the last, so your body learns to relax around a bigger shape without being rushed. There's no timetable. Some people move between sizes in a single session; others stay with the small plug for weeks. Going back down a size on a tense day is completely normal.
NS Novelties lists the three plugs as roughly 2.72, 3.15 and 3.74 in long overall, with listed widths of 1.26, 1.34 and 1.61 in. The maker quotes insertable lengths of about 1.77, 2.4 and 2.99 in across the set. The jump from small to medium is modest, while medium to large is the bigger step, so give yourself time before trying the largest. Having all three also lets you use them as a warm-up sequence within one session: small first, then medium, then large once you feel relaxed and open.
NS Novelties lists the plugs as lightweight aluminum. Metal is firm and completely smooth, so with good lube it glides in with very little drag, and the shape doesn't squash or bend. It also responds to temperature. Run a plug under warm water for a minute before use for a cosy feel, or cool it under the cold tap for a sharper sensation; always test the temperature on your wrist first. The tapered tip opens you gradually and the narrower neck lets your muscles close around it so the plug stays seated.
Use plenty of thick lube on both the plug and yourself. Lie on your side with your top knee drawn up, breathe out slowly and press the tip in gently, pausing whenever you feel resistance. Never force it. Once it's in, the stone sits flat between your cheeks. Start with short sessions of 10 to 20 minutes and listen to your body.
Wash each plug with warm water and mild soap or a toy cleaner before and after use, and dry it thoroughly so the finish stays bright. Avoid abrasive scrubbers, which can scratch the coloured surface. Store the three together in a pouch so they don't knock against harder items.
New to anal play? Read what butt plugs are for, or browse all butt plugs.
Helpful answers about NS Novelties Rear Assets Rainbow Graduated Anal Plug Training Kit.
Yes. The small plug is just under 1.8 in insertable, which is a gentle first size, and having two larger plugs means you won't need to buy again as you progress. Take your time with each size before moving on.
Metal works with any lubricant, so you can use a thicker water-based or silicone lube that lasts longer for anal play. The anus doesn't make its own lubrication, so be generous and reapply. Our anal lubes are formulated to stay put.
Start with 10 to 20 minutes and build up only if it stays comfortable. Take it out straight away if you feel pain, numbness or sharp discomfort. Longer wear is something to work toward slowly, not a goal for your first session.
Yes, that's one of the perks of metal. Hold a plug under warm or cool running water for a minute, then check the temperature on your inner wrist before use. Avoid boiling water, the freezer or ice, which can make metal uncomfortably hot or cold.
When the current plug goes in easily, sits comfortably and you can relax with it in place. If the next size feels like too much, go back for another session or two. Progress is rarely linear, and that's fine.
The shapes and graduated sizing idea are the same; the difference is the look. This set has an iridescent rainbow finish, while the rose gold and pink kit has a warmer metallic tone with pink stones.
Handle it like jewellery. Clean with a soft cloth or your hands, skip abrasive pads and harsh chemicals, and store the plugs in a pouch rather than loose with keys or other metal toys. Stop using any plug whose surface becomes rough or damaged.
Expert guidance to help you choose, use and care for your products with confidence.