A sterile device intended to be fitted into a suction system bottle/canister to separate tissue from the aspirate during a surgical procedure; the tissue may be subsequently used for various diagnostic/therapeutic purposes (e.g., autologous fat tissue transfer, histological/pathological analysis). It is a meshed flat or tubular piece; accessory components (e.g., container sealing rings, tubing, filter housing) may be included. This is a single-use device.