Precise Design: The lid has a precise and stable design that protects your expensive machine while soaking coffee grounds and extracting full bodied coffee with golden cream. Rust Proof: Reusable capsule lid is made of food grade 304 stainless steel material, durable and to keep your coffee no odor. Reusable: The reusable and refillable design eliminates the need to repurchase capsules, saving daily costs and creating the excellent coffee experience for you Delicious Enjoyment: Simply prepare and your used capsules and fill them with medium fine ground coffee, put on the fillable lid and brew, then you'll have a delicious cup of coffee Features: Unique process with strong sealing, no leakage, ensure fast brewing, the included brush will help up and make things easier.