The Bottle Caps are Blue Microphones' innovative system of seven interchangeable capsules that fit into the Blue Bottle microphone. Each capsule offers 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. The Bottle Cap Capsule Kit includes the entire collection of capsules available for the Bottle Microphone except for the B6 which comes with the Bottle microphone.

• B0: Cardioid Large Diaphragm: "The ultimate big vocal sound"
• B1: Cardioid Small Diaphragm: "The accuracy plus capsule"
• B2: Figure of Eight Large Diaphragm: "The vintage capsule"
• B3: Cardioid Mid-Sized Diaphragm: "The neutral capsule "
• B4: Perspex Sphere Pressure Omni Small Diaphragm: "The big omni"
• B5: Pressure Omni Large Diaphragm: "The presence omni"
• B7: Cardioid Large Diaphragm Single Backplate: "The classic vocal sound"