MATERIAL: These contact lens cases are made of plastic. The smooth surface helps protect your contact lenses from damage. USEFUL AND PORTABLE: These contact lens cases are small and portable, making them easy to carry in your purse or pocket. ASSORTED COLORS: These contact lens cases come in a variety of colors. Each package includes three different colors, allowing you to distinguish between users or between left and right lenses. EASY TO USE: The lids are easy to open and close. Each case features a clear "L" or "R" mark to help identify left and right lenses, with color-coded lids for additional differentiation. DAILY CARE: Clean the contact lens case before each use. It is recommended to replace the case monthly.