A little experimentů I was curious how long the travel size toiletries last. I decided to buy shampoo and conditioner to use at home, and labeled them with the start date so I wouldn't forget. It turns out that three ounces is good for 21 days, at least with my short hair!
Kind of interesting. I'm trying to fine-tune what I bring with me on trips. It is always the toiletries that cause the problems, and I think it's because I overestimate what is needed. I don't want to run out of anything, but there's no point in carrying around extra.
I took a photo in case the labels peeled off. It was actually random that it was right in front of the travel books