Introduced in the Missions and QoL update, the Vodka Bottle is a quest item used in the Lost Bottles Mission, which is given by the Lumberjack NPC located in the Bandit Camp monument.
Once the Lost Bottles Mission is accepted, the Vodka Bottle must be located and brought back to the Lumberjack in order to complete the mission and receive the reward.
The Vodka Bottle itself serves no additional value outside of the Lost Bottles Mission, as it does not provide sustenance nor hold liquid.