- The flip-top lid is used a secure lock, making it dust-free and leak-proof. This water bottle is portable, light, and easy to use. Its?Bisphenol and Toxin Free?Made of highly durable, crystal clear, and BPA-free co-polyester plastic. A high-quality fitness bottle can keep you safe and secure during use. Suitable for both warm and cold beverages (-40 to 212°F)