1. Unscrew the pump of your Eau de Parfum bottle using the key provided with the refill 2. Use the funnel provided to pour the refill into your Eau de Parfum bottle 3. Reattach the spray applicator using the key and put the cap back on. Fragrance amp; notes: Top: Grapefruit amp; Cypress Heart: Orris accord, Carrot seeds accord amp; Geranium Bottom: Leather accord, Vetiver amp; Cedarwood