
We have our own practice room and we used a lot more rubbing alcohol than in the past. Unfortunately, our regular suppliers couldn't keep up with the times, so we had to buy from companies we didn't know. We bought this to test the alcohol content of the bottles we bought. It worked like a charm! We use different concentrations, 62, 70 and 99% solutions. First we tested our notoriously good supply and everything was verified. Then we tested our new bottles. To our great relief, they were all as they claimed. We'll continue to test every gallon that comes in and we feel a lot better about what we're using. (Read all of their instructions carefully. When people say they broke right away, I wonder how they handled it. One of the instructions says they mostly break when people throw them in a test jar , which contains a high percentage of alcohol.)

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