Speed Stick Deodorant

On 14 December 1997, for reasons than now escape me, I noted the date that I started using a new deodorant stick—the brand I had already been using for years before then, Speed Stick by Mennen, 3.25 ounces. When I replaced that stick with a new one almost a year later, I recorded the date, and have been keeping track since then. I guess I have a mysterious curiosity about such minutia (I love to put dates on things, such as when I acquire or read a book, or write a poem). The following table records the number of days I used each deodorant stick since I started keeping track, complete with the dates involved, plus the location where I was living and other occasional notes. You really wanted to know all this, right? Nod vigorously if you’re as fascinated as I am despite the oddity of it all. And scroll down for a graph and additional comments.       +       +       +       +       +

Date

Number of Days

Location / Notes

14 December 1997

~

Foster City, California

10 December 1998

362

 3.25 oz

9 August 1999

242

 

10 April 2000

245

 

1 December 2000

235

 

29 August 2001

271

Belmont, California

1 May 2002

245

 

2 December 2002

215

Redmond, Washington

15 June 2003

195

Sammamish, Washington

19 January 2004

218

 

29 August 2004

223

 

11 May 2005

255

 

4 January 2006

238

 

20 November 2006

320

 

19 July 2007

241

 

15 March 2008

240

 

1 December 2008

261

 

11 September 2009

284

 

20 May 2010

251

 

6 February 2011

262

 

2 October 2011

238

 

28 June 2012

270

 

24 June 2013

361

 

18 August 2014

420

3.0 oz?

4 June 2015

290

3.0 oz

23 December 2016

568

3.0 oz

TOTAL DAYS:

6,950

278 days per year on average


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).


As of December 2016, the total number of days, 6,950, divided by the number of sticks, 25, equals an average of 278 days per deodorant stick. So far, the lowest usage was 195 days, and the highest was 568 days (291.3 percent higher than the lowest). 
Stay tuned for more thrilling data in the years ahead. Try to contain your excitement.

Notes: Number of days determined at http://www.timeanddate.com/date/duration.html or http://www.convertunits.com/dates/ (both excluding end date). Just so you know, Mennen was acquired by Colgate-Palmolive in 1992.