High-quality materials: These test tubes are made of high-quality PET plastic, which is non-toxic, environmentally friendly, and not easy to break. The hard shell ensures durability and is easy to clean. Good sealing performance: the test tube can be easily opened and closed with the screw cap. It has excellent leak-proof performance and can prevent liquid leakage to keep the stored items sterile and moisture-proof. Washable and reusable: You can wash the tube to keep it clean, which is very suitable for reusable and other purposes. Wide range of uses: These test tubes are very suitable for holding beauty liquids, such as cosmetic samples, lotions, liquids, gels, etc., and are easy to carry and use when traveling. It can also hold various small items, such as pearls, candies, needles, samples, small pebbles, etc. Suitable for collecting gifts, expressing love, handmade, etc.