XLAB Torpedo System 400 Refilling & Replacing Options: Solid Refill Lid is ideal for adding powder, tablets and fluid. Slotted Refill Lid is ideal for adding tablets and fluid. Refill area is located behind the computer allowing you to keep the computer screen clean & clear! The TORPEDO BOTTLE can be moved to another XLAB cage on your bike so you can use standard bottles or bottles from an aid station. Proven aerodynamically invisible by 5x WORLD CHAMPION Craig Alexander & Mat Steinmetz at the Velodrome, June 2013. Computational Fluid Dynamic (CFD) airflow optimized and velodrome aero testing approved. Spacers - allows you to adjust the bottle to the height of your arms resulting in zero crosswind drag. Dolphin tail designed straw retainer - allows you to fold the straw flat. Directs air over the straw. Saves up to 100 grams of straw drag.