Apparatus 2 for handling liquids (80 figure 8a) comprises a vessel 4 for containing a liquid (80), a cap 6 having a liquid passage (56 figure 2) for flow of liquid into or out of the vessel 4, and a vent tube (62 figure 2) which in use is disposed within the vessel 4 between the cap 6 and a location near the base of the vessel remote from the cap. The cap further comprises a first vent passage (58 figure 2) for fluid communication between the inside of the vessel 4 and the outside of the apparatus, a second vent passage (60 figure 2) for fluid communication between the vent tube (62) and the outside of the apparatus. There is a switch member 10 which is movable between a first position in which it causes or permits the liquid passage (56) and the first vent passage (58) to be open and the second vent passage (60) to be closed, and a second position in which it causes or permits the liquid passage (56) and the second vent passage (60) to be open and the first vent passage (58) to be closed.
