FIELD: medicine. SUBSTANCE: an impermeable notch in the form of a groove is made on the open surface of a sheet forming a hole. The impermeable notch in the form of a groove is made from one edge of the individual single hole to the opposite or adjacent edge. When the single hole is bent over or bent in the impermeable notch in the form of a groove, the sheet forming the holes is broken. The lesser part of the broken generating sheet still connected to the coating material functions as a lug for unsticking the coating sheet from the generating sheet opening the content of the hole. EFFECT: facilitated opening by instructed persons and provided opening by instructed persons and provided inaccessibility for children. 6 cl, 4 dwg
