The child-resistant blister pack for unit dosage forms has a blister film sheet with depressions therein, unit dosage forms within the depressions and a lidding sheet which overlies the depressions and which is secured to the film sheet so as to seal the unit dosage forms within the depressions. The safety seat has a safety belt harness and can be secured between the floor and ceiling of a vehicle via securement straps provided above and below the seat. The walls define an internal cavity, and the housing includes a cavity access opening. A method of operating such a flowmeter is also disclosed.