Abstract: A lightweight disposable container is described for in situ sterilization of a portion of a flexible tube such as the exposed end of a permanently embedded peritoneal catheter. The container has a basin and means for retaining the catheter portion to be sterilized in the vicinity of the basin bottom for submergence in a sterilizing solution in the basin. In one embodiment, a plurality of projections which are an integrally molded part of the container are spaced from each other at inlets to frictionally clamp the catheter in a gap formed between the projections. In another embodiment, the projections are formed in a hinged lid so that when the lid is closed the catheter or other tubing used in the procedure may be retained submerged under the solution. Several forms and locations for projections are disclosed.