The TENGA AERO includes one sample of TENGA HOLE LOTION [REAL].   We recommend using TENGA HOLE LOTION for further uses. Please note that while the material of the interior (TPE) should be compatible with other water-based lubricants, we cannot be held responsible for any damage that may occur from third-party lubricants. Oils and silicone-based lubricants should not be used, as these can damage the material.