The Bullet Smart Tritan Sports Bottle is BPA-free and features single-wall construction with a secure twist-on lid for easy use when you’re on the go. The lid features a unique built in “numerical counter” designed to help you track, record, and improve your daily hydration habits. To keep your sports bottle in peak condition, we recommend hand-washing only. Key Features Rugged Eastman Tritan material Single-wall construction Built-in numerical counter tracks hydration habits BPA-free Hand-wash only Care instructions included