Premium Quality: The shell of the atomizer perfume bottle is made of aluminum, the inside is glass, so you can use the travel bottles for perfume confidently. Portable Cologne Sprayer: 8ml/pcs, set of 4 different colors. Size 3.7x0.9x0.9 inches. Highly portable and barely takes any space. No need to carry heavy perfume bottles or worry about TSA 3 oz requirements. Easy to Use: Cap-free design—twist the top like lipstick to expose the spray nozzle and press to spray; twist the opposite direction to retract. This feature prevents leaking and evaporating. How to Refill Perfume: Pull the inside bottle up and out after twisting the spray nozzle loose, then use the funnel, dropper, or pump for easy refill. Great for perfume, cologne, essential oils, and mouth freshener. Widely Use: Lightweight, attractive, and mini-sized for pocket, purse, bookbag, or luggage. Perfect for travel, dating, or parties.