0.5% Retinol Beginner Serum Refill Sachet- 50mlYour Silki Serum bottle is designed to be reusable, not disposable. Simply refill your existing skincare serum bottle with Silki serum refill sachets and continue using your favourite retinol 0. 5% anti ageing serum. This sustainable skincare solution delivers glowing, healthy skin while reducing plastic waste. Key Benefits: Reduces fine lines and wrinkles Improves skin texture, tone, and clarity Strengthens the skin barrier and locks in moisture