Filter insert and sample vial using the same

A sample vial assembly, the assembly comprising:

• a sample vial having a proximal open end and a distal closed end;
• a filter insert, the insert comprising:
• a cylindrical body having:
• a proximal end;
• a protrusion extending radially from the proximal end of the cylindrical body and configured to set on the open end of the sample vial;
• a distal end;
• and
• a cavity extending longitudinally through the cylindrical body from the proximal end to the distal end;
• and
• a filter assembly coupled with the distal end of the cylindrical body;
• and
• a seal configured to couple with the proximal open end of the sample vial and allow for passage of a sample extraction member through the seal and into the cavity of the cylindrical body.