UV Protection: The roller bottles for essential oils are made of corrosion-resistant thick amber glass, protecting the oil against harmful UV rays Leak-Proof Design: Dual metal caps, screw bottle mouth and tightness stainless steel roll balls prevents any sort of leakage. Portability: 0.8 inch wide, 3.35 inch height. 0.35 Ounce (10ml) Capacity. Perfect for travel and it easily fits in your purse. Multiuses: Ideal Storage & Dispenser Bottles for essential oils, perfume, beard oil, skincare oil, massage oil and more Package includes: 4 Pack blue roller bottles + 1 metal funnel for easy filling + 12 stickers + 1 spare roll ball + 1 opener