POWDERED STARTING MATERIAL, BOTTLE CAP, AND CONTAINER COMPRISING SAID BOTTLE CAP

摘要

This powdered starting material is contained in the containing part (12) of a bottle cap (1): that has a containing part (12) therein, which contains a powdered starting material; and in which the containing part (12) opens and releases the powdered starting material into the bottle when an uncapping operation occurs. When said powdered starting material is dropped on a watch glass from a powder dropping point and the dropped weight and the weight on the watch glass are measured using a multifunction powder property-measuring multitester, the degree of dispersion obtained from formula (1) is 5% to 40%. Degree of dispersion [%] = (dropped wgt - wgt on watch glass)/dropped wgt × 100 (1)