1. Each compartment is its own separate unit to prevent any leakage. 2. Side-storage compartment Bottom-storage compartment. 3. Designed for storing iphone 6. 4. Waterproof and stable. 5. Made with durable BPA-Free tritan 6. Uniquely designed handle prevents rolling when the bottle is laying down. 7. Designed for storing and accessing headphones and charging cables. 8. Liquid compartment