I love these bags to carry my travel bottles like shampoo, facial cleanser and creams. Also I use them to put my toothbrush, toothpaste and mouthwash in when I pack my bag. It's nice to have something you can't see through to put in your bag for travel. However, I don't think you could use these for a carry-on bag because the TSA agents can't see what's in them. I believe the bag must be clear. Never- the-less, they are fun for travel.