The Bottle is the default melee weapon for the Demoman. It is a brown glass bottle of scrumpy marked with 'XXX' on the label and a year suggesting it was made in 1808. When a critical hit strikes anything that is solid (not air), it will shatter cosmetically and will remain that way until death/map change. It's critical animation is a fast down-faced swing. It has the default melee stats like most stock melee weapon do, base damage of 65, but can be 55-75. A minicrit does 75-101, and a critical hit does 195. It is generally used if the demoman will recieve notable amounts of swlf-damage as almost all of his weapons are spash damage excluding most of his melee weapons, the one that uses explosive damage is the Ullapool Caber.
However, the bottle no longer breaks due to an update. Some of us are longing the day when they bring that feature back.