A cap is provided for a laboratory vessel. The cap includes a lid that can be rotated relative to the laboratory vessel from a closed position to an open position. The lid includes a shield for at least partly surrounding the open top of the laboratory vessel. Ribs are disposed on outer surfaces of the...http://www.google.com.au/patents/US7546931?utm_source=gb-gplus-sharePatent US7546931 - Flip top cap
