Pro-Optics' Value Pack includes 12 different bright colored screw top contact lens cases in a handy storage jar. The newly redesigned Tight-Top™ by Pro-Optics is a high-quality, leak-proof contact lens case for cold chemical disinfection. The Tight-Top™ is ideal for hard or soft lenses and features assorted contrasting color caps for easy identification of Right vs. Left lenses. Always follow your practitioner's instructions for proper care of lenses. For best results, replace your contact lens case monthly.