
I bought these for an upcoming 2 week trip to Hawaii where I will only be taking carry on luggage. I use it for my multi-step facial cleanser and moisturizer. I've had the opportunity to test them out over the past 3 weeks while traveling within a few hundred miles of home. I wanted to make sure they would last a full 2 weeks, not leak, and be malleable enough to extrude a thicker product. I am happy to report that these little fellows do not leak, they are very flexible and have lasted a full 3 weeks without needing to be refilled. Given how much is left, I'm estimating these bottles will last around 5 weeks of product (each application is about the size of a large pea to just under a dime). I can easily fit 5 bottles in a liter zip and leave enough room to meet TSA requirements for carrying liquids.

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