The present invention relates to a sealing device to seal a container, the sealing device including: a tip that defines an internal passage leading to an opening and is designed to allow connection to a collection member such as an enteral syringe, a non-return valve that is associated with the tip and is designed to open during collection of the contents of the container using the collection member, at least one air-return port, and an antibacterial filter associated with said at least one port.