PROBLEM TO BE SOLVED: To solve the problems that, in a communication passage for communicating a content of a flavoring agent/deodorant/repellent or the like which is a conventional storage product in a container with the outside air, adjustment over the whole range such as large opening change, fine precise change, or long-term continuous discharge is difficult.SOLUTION: A ventilation amount changing tool can perform gaseous exhalation of a component of a stored content corresponding to short-term or long-term adjustment around a container with a main same member, regardless of size change of the storage container from slight exhalation to strong exhalation.SELECTED DRAWING: Figure 1
