Plug your butt until you bust your nut with ERGO, Liquid Platinum Silicone ergonomic buttplug from OXBALLS. ERGO is a smooth silicone plug with a flared base and ergonomic kidney-shaped design. Oxballs makes Liquid Platinum Silicone toys using the absolute best materials. custom mix silicone for the right warm rubbery feel, each batch is hand mixed super rich color, and hand-pour/hand-finish every toy in small batches—machine made gear can’t match this stuff.