A top with a mantle wall defining a sample space, for receiving a liquid sample, the tip having first open end to be inserted into a liquid and a second open end for attaching the top to a suction device intended for dispensing, which tip is provided with a membrane device closing the gas and liquid...http://www.google.de/patents/US6499364?utm_source=gb-gplus-sharePatent US6499364 - Tip for a suction device
