Bio-Mark, used for sample preparation in microbial detection or chemical analysis in food, is made of extremely robust and durable high-strength materials that do not break under the strong impact of a homogenizer. All are sterile packaged. Homogenization bags with filtration filter sample residues after homogenization, eliminating the need to wait for sedimentation. Sampling and inoculation can be performed from the other end of the filter membrane, avoiding interference from sample residues in colony analysis results.