Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Misleading

Product description indicates a metal gage, which would allow you to have the unit refilled. The item I received clearly says "disposable" on the package and has a plastic gage/discharge nozzle. Also, the meter indicates this unit is only about halfway full. I feel like I wasted my money on a non-refillable item which will only last me half as long as it should.