One of the luxury sponges on display at The Penthouse Group was Tera Venus, which the company claims is the first luxury cosmetic sponge guaranteed not to change color over time. It says that accelerated lab tests have proven that the applicator will not be affected by UV light or noxious gases over a three-year period. Tera Venus is also heat-sealable, making it ideal for use as an eye shadow applicator, but virtually all shapes and designs are achievable in this material.