Features Complete set of all capsules for the Bottle System, Bottle Rocket Stage One and Bottle Rocket Stage Two Description Product Description The Bottle Caps are our innovative system of eight interchangeable capsules, each offering the recordist a different tonal characteristic and pickup pattern. From airy highs to larger-than-life lows, the Bottle Caps capture anything from vocal to bass, wind instruments to horns — and everything in between with a level of detail and clarity found in only the most expensive and rare vintage classics. Below is a summary of each capsule with suggested recording applications.