It’s been interesting to see how varied the length of time can be for each stick—as low as 195 days (just over half a year) to as many as 568 days (more than a year and a half, or nearly three times as long as the shortest time). I always put the deodorant on the same way regardless of the weather, so hotter months are no explanation for the rather wide variance. One possible explanation I have for sticks that lasted longest is that those days have sometimes corresponded to periods when I worked at home, and may have skipped having showers sometimes. But great variance occurred even when I wasn’t working at home, which I can’t explain (the variance, not working away from home).
        Since the start, I have been careful to get the exact same brand each time—and I thought the same size. The plastic dispenser has always remained the same in size, but somewhere along the line the amount of deodorant in each package was reduced. At some point the 3.25-ounce size was reduced to just 3.0 ounces. Not sure when that happened (maybe someone at Mennen could tell me?), but I do know I always used the same the deodorant brand with the same size packaging, and I know the product size for 2014 or 2015 or later is definitely 3.0 ounces, and that I started off with 3.25 ounces, even though the size of the container never changed. If we factor in the variable that later usage days were from a smaller product amount, I’ve been getting even more mileage out of less product content in recent years.
        The following chart indicates usage up to December of 2016 (number of days of usage per deodorant stick).