A vented draining device configured to be affixed to an existing container, such as a plastic beverage bottle with a threaded neck finish. The vented draining device allows for the attachment of a tube for the connection of the draining device to a fluidic system for draining while venting air from the existing container. Apertures in the draining device provide venting for the exhaust of air which is displaced by the fluid which is drained into the container.