Small but mighty, each capsule is equivalent to one travel size TSA bottle that you can buy at your local drugstore. Made with a more short, then tall design, you might not see it, but it's spacious! Each one holds approximately one to two weeks worth of skin-care products.
For me, this depends. I use a lot of moisturiser, so I would fill two with my favourite cream for a 10-day trip. For the same amount of time, when it comes to my face wash, which I'm more sparingly with, I would use just one capsule.
Image Source: POPSUGAR Photography / Krista Jones