When it comes to butt plug materials, any nonporous material is a safe bet. Glass/Pyrex, stainless steel, and silicone are all anal-safe nonporous materials that won’t harbor bacteria. Some hard plastics are nonporous, but most anal toys will be glass, steel, or silicone. It’s ideal to stick with one of these materials because they can be sanitized in boiling water if they’re non-motorized.
Spectrum Boutique makes anal toy shopping easy because we exclusively stock noporous anal toys, but it’s also good to know what materials to avoid. Elastomer/TPR/TPE, jelly, CyberSkin, stone, and most likely any mystery material you encounter, are porous materials that cannot be sanitized.
Beyond that, the specific material you pick will come down to personal preference! As long as it has a flared base or definite stopping point, it’s anal safe! Read more about our favorite nonporous anal toy materials!