Sinclair Institute Optima Vaginal Toning & Pleasure Balls. Increase health and pleasure! Weighted, silicone, vaginal toning and pleasure orbs help strengthen the PC muscle to help reduce the risk of urinary incontinence, prepare for and recover from childbirth, and maintain vaginal tightness for improved sexual response and stronger orgasms. This toy is compatible with water-based lubes; try the Better Sex Essentials Gel Personal Lubricant. It is not recommended to be used with silicone lubes. After use, carefully wash the toy with mild soap and water or try the Better Sex Essentials Toy Cleaner for even quicker cleanup. Store this toy separately from other sex toys.