A dispensing head for a container is disclosed. The dispensing head includes a portion defining at least one opening on the dispensing head for permitting dispensing of a product via the opening. A valve is configured to limit direct flow of air into the container via the opening and to permit dispensing...http://www.google.co.uk/patents/US6145707?utm_source=gb-gplus-sharePatent US6145707 - Dispensing head and a dispenser including the same
