Material: These small glass vials are made of high-borosilicate glass, offering excellent resistance to chemical corrosion and impact. The cap is black, and the clear glass vial body is easy to clean, reusable, and refillable for long-term use Portable Size: Each tiny glass bottle measures 18 mm x 42 mm (L x W). This mini size fits easily into pockets, travel bags, bathroom cabinets, or cosmetic cases, making it ideal for travel toiletries and daily carry Leak-proof design: The vial is tightly sealed, not easy to leak. The foam seal paper inside the cap can effectively seal the bottle even when you don’t insert a reducer plug in Wide range of use: These glass bottles suitable for smaller applications such as loading various oil; compound essential oils; facial serum; eye serum; perfume oils; sample display, etc Package includes: 10 pack 5 ml glass bottles, to meet various needs