PREMIUM QUALITY DURABLE PLASTIC BOTTLES (BPA FREE) - High quality HDPE Plastic. More durable than PET and can handle a wider range of temperatures. Can also be used to freeze drinks | TAMPER SEAL CAPS - The tamper evident caps will ensure no one tampers with your drinks and also look professional for selling drinks | WASHABLE AND REUSABLE - Can be used for your kids school lunch, gym, or anything else. Can be used with any kinds of drinks | EASY TO LABEL - Bottles can be written on directly with a permanent marker so it's easy and convenient to label your drinks | SIZE 2 3/8 X 7 INCHES - CAPACITY 16 OUNCES - The perfect size for when you are going to the gym, school, or work. Also perfect for meal prep