The Bottle Caps are Blue's innovative system of nine interchangeable capsules, each one offering the recordist a different tonal characteristic and pickup pattern. From airy highs to larger than life lows, these Bottle Caps capture anything from vocals 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. These capsules work with Blue's Bottle, Bottle Rocket Stage One mics, and Bottle Rocket Stage Two, or any microphone with a foundation for interchangeable capsules. Each capsule in this series are numbered from B0 to B8, each accompanied by their unique sound.

-Very transparent, neutral sound
-Suggested Applications: Female vocals, distant miking of orchestral groups and instruments, banjo, mandolin, resonator guitar, jazz guitar, distorted electric guitar, electric bass, a natural or “folky” tone on nylon and steel-string acoustic guitar, oboe, bassoon and other double reeds, organ.

Further details can be found on the Blue Mic website.