Relates to drainage apparatus having (1) an outer container for receiving a (2) with hole inner container, the outer container (1), the invention is capable of supporting hole with the inner container (2) in a high position and a low position Yes, with hole inner container (2) has the outer side two projections (22) at least when in a high position, at least the outer lateral projections of the two holes with the inner container (2) is (22), It is seated support member of the outer container (1) to (16) above. In accordance with the present invention, (1) has a (17) upper opening the outer container, an upper opening (17), between (16), the side of the at least two support member and inside the outer container (1) It provides (12) recess, when in the low position, (12), with hole inner container (2) is designed to accommodate at least partially the outer lateral projections (22) recess side.本発明は、穴付き内側容器(2)を受け入れる外側容器(1)を備えた排液装置に関し、外側容器(1)は、低位置および高位置において穴付き内側容器(2)を支持可能であり、穴付き内側容器(2)が少なくとも二つの外側側方突起(22)を有し、穴付き内側容器(2)が高位置にあるとき、少なくとも二つの外側側方突起(22)が、外側容器(1)の支持部材(16)上に着座可能である。本発明によれば、外側容器(1)が上部開口(17)を有し、上部開口(17)が、外側容器(1)の内側且つ支持部材(16)の間に、少なくとも二つの側方窪み(12)を提供し、穴付き内側容器(2)が低位置にあるとき、側方窪み(12)が、外側側方突起(22)を少なくとも部分的に収容するよう設計される。
