The ergonomic design of the base ensures it won’t slip too far inside while still fitting comfortably between your cheeks. The hypoallergenic glass is nonporous and body safe, and when cared for properly, is designed to last a lifetime. Run the plug under warm water to heat things up. Chill it under cold water or put it in the freezer for a cool sensation. Material: Glass Insertable Length: 3" Width: 1.25" Lube Compatibility: Compatible with all lubes