Kind of random, but I thought I’d make a list of how long these common household items take to get used up. These are pretty much estimates that are just based on my own usage habits.
| Item | Time to Consume (months) |
| Bar of Soap (1” x 3” x 4” approx.) | 2.5 – 3 |
| Bottle of Shampoo (355 mL) | 3 |
| Toothpaste (170 mL) | 5 |
Hmm so taking the lifetimes of all these items, the lowest common factor is 15. For every 3 tubes of toothpaste, I should buy 5 bars of soap and 5 bottles of shampoo. Assuming that I start using all of these at the same time that is.
Looking at these numbers puts things into perspective. I always felt like I’ve been replacing these same items over and over, but I guess I just lost track of how long it had already been since I last replaced it.