A device and a method for emptying a container with a liner. A product guide tube with an upper liner connection end, a lower connection end, and an access socket branch off from the product guide tube and is capable of being closed. The liner connection end comprises a sealing ring arrangement, which has an outer ring arrangement fixedly connected to the product guide tube and a guide ring arrangement formed coaxially to the outer ring arrangement and axially adjustable along a tube axis. The outer ring arrangement has on its inner side, a lower and an upper radially inwardly adjustable sealing ring, which are spaced apart from one another in the axial direction along the tube axis. The guide ring arrangement comprises a guide socket with an outer sealing surface which are arranged in a working position of the guide ring arrangement radially inside the sealing rings.