Possible Clues:

• Discourage accepting American prison vessel
• Can't have venison without a bottle of wine!
• Perhaps slow to a trot if there's some drink in
• Type of bottle
• Put off about tin as container for wine
• Perhaps slow down for a drink from there
• Glass container for table wine
• Slow the horse down to a trot, perhaps, when there's drink in it
• Is able to discourage holding bottle
• Wine/spirits container