Our 15 ml Euro Round Glass Bottles with 18-DIN Neck Finish, similarly, is a type of Boston Round Bottle. For instance, like the Boston Round. It has rounded shoulders and a rounded base. A Euro Round has a Tamper Evident notch around its neck. Glass makes a great choice for packaging due to its high clarity, it can be colored, has high chemical-resistance levels, and has an extremely high resistance to heat and cold.