Related Clues:

• Vessel - nerve
• Type of marine mammal
• Liquid container - courage
• Nerve - container
• Cool courage
• Cleans — bottle
• Audacity (informal)
• Derring-do
• Nerve shown by one with message, maybe
• Bottle-opener very well hidden?
• No chance of a drink in the trunk or the canteen
• Courage, informally
• Impulse transmitter — bottle
• Pluck — viscera
• Brass neck