DURABLE MATERIAL - The flip cap containers are made of quality PET plastic which is reliable. The bottles are sturdy and durable, providing a long service life. They can be reused after a simple rinse. LEAK-PROOF - Plastic empty bottles with flip cap have an excellent sealing and prevent leaking. Compared with wide-mouth bottles, the small outlet is very good for controlling the flow. The contents will not gush out in large quantities and cause waste. EASY TO CARRY - You will receive totally 100 pieces empty refillable bottles with a capacity of 1 oz/ 30 ml. These bottles are not a regular shape but taper toward the top. They’re very lightweight and compact in size. You can easily put them to your bags, purse, backpack, etc. PRACTICAL GIFTS - The transparent bottle allows you to easily identify the contents. The refillable flip top bottles are suitable for business trips, vacation trips, gym, or outdoor activities. HASSLE-FREE PURCHASE - We provide all customers with higher quality products and satisfactory shopping experience. Let us know if you find any quality issues after receiving the clear plastic travel bottles. We will offer a 30-day refund.