Simple-e- 5pcs 10ml (1/3oz) Glass Roll on Green Colorful Stainless Steel Roller Ball Essential Oils Perfume Heavy Thick Glass Bottles Black Cap Stainless Steel Roller Free Gift Epacket Shipping They are great for traveling The bottle itself are natural translucent .They hold 1/3oz of product (10 ml) so they are a TSA approved size for air travel. Capacity:10ML(1/3oz/)pcs Pack of 5pcs epacket free shipping