A container (2) for containing a liquid such as water comprises a fluid outlet (10) having a hole (13) for allowing fluid to escape. A surface (12) defining the hole (13) is provided with at least one recessed portion (11). Because of the presence of the recessed portion (11), if the hole (13) of the fluid outlet (10) becomes plugged with one or more particles, fluid can still escape through a passage formed by the recessed portion (11). In one embodiment, the container (2) is equipped with at least one projection (15) extending inwardly in the container (2) from a position near the hole (13) of the fluid outlet (10). The projection (15) functions to avoid blockage of the entire hole (13), including the recessed portion (11), by a relatively large particle.