An assembly is disclosed for collecting fluid during a medical or a surgical operation. The assembly can include a canister having an openable lid and a collection liner. The collection liner can include a closed bag portion and an inlet for a collection container. The inlet has a first end and a second end, which opens into the bag portion. The bag portion is placed inside the canister. The first end of the inlet for a collection container extends from between the edge of the canister and the edge of the lid to the outside of the canister when the lid is closed.
