Abstract: The invention relates to a multi-purpose mechanical device for use in conjunction with a bottle, specifically a bottle whose opening is mechanically closed with a top of sorts and whose contents are meant for consumption and suitable for the addition of supplemental tastes after the top of the bottle has been removed. The multi-purpose mechanical device of the present invention may be used as a bottle opener, an infuser or injector of consumable matter into an open bottle, or a vessel for use in measurement and/or ingestion of a liquid consumable. Additional benefits of the mechanical device of the present invention are that it has a low production cost; is a simple, two-component mechanism; is small, compact, and easily portable; it is able to fit into a palm of a hand of a user, a pocket of an article of clothing, a carry means, or the like; and it may be attached to a lanyard, key ring or the like.