100mL curates packs of high-end beauty brands like Aesop in TSA-compliant sizes, so people can pack discerning taste to go (even in a carry on). Packing for a trip usually means buying whatever travel-sized shampoo, body wash, and toothpaste your nearby drugstore sells or squeezing product into mini containers the Transportation Security Administration (TSA) won’t make you toss out at security.