Why We Love It This soft flask is designed for straightforward drinking on the move. The bite valve lid allows easy, controlled sipping without stopping, making it ideal for carb drink mixes and hydration mixes during training or racing. It collapses as you drink to reduce movement and bounce, fits securely into vests or belts, and keeps your setup simple and mess free when the pace is on. Talk Nerdy To Me The Aid Station 250ml Soft Flask with bite valve is designed for efficient hydration during endurance training and racing. The bite valve delivers consistent flow with minimal effort, allowing you to drink on the move, sealing automatically between sips to help prevent leaks. Thanks to HydraPak, the flask is made from ultra-flexible, abrasion-resistant TPU with RF-welded seams for durability, is BPA and PVC free, top-rack dishwasher safe, freezable, and heat safe up to 60°C. Fast Facts - 250ml soft flask capacity - Bite valve perfect for drink & hydration mixes - Leak-free - Collapsible, bounce reducing design - BPA and PVC free - Top rack dishwasher safe and heat safe up to 60ºC