The invention relates to a vacuum container 2 for drainage of fluids or wound secretion, wherein the vacuum container 2 is pre-evacuated, with an inlet opening 4 for connection to a drainage line 3, which is characterized in that at the inlet opening 4 a vacuum indicator 6 is located and that the inlet opening 4 is sealable. The invention further relates to a drainage line 3 for drainage of fluids or wound secretion, characterized in that the drainage line 3 has a vacuum indicator 6, wherein the vacuum indicator 6 is designed to indicate a vacuum inside a connected vacuum container 2. Further the invention relates to a system 1 for drainage of fluids or wound secretion, comprising a vacuum container 2 according to the invention and a drainage line 3.
