When we get ready to go on a trip we pull out a large Ziploc baggie from the kitchen drawer and fill it with our little Nalgene bottles. We thought it would be nice if we had something a little sturdier and perhaps more stand-up-ish on the hotel sink. So we developed this one quart bag to fit the TSA regs. We added a leakproof zipper as a secondary containment in case that travel sized shampoo bottle leaks. We threw in a little carabineer so it would be easier to hang and thought we had something pretty good. So we added four below 90ml leakproof bottles with colour coded caps; one Q-tip vial, and one straight sided jar for pills or thicker gels and lotions. There is plenty of space left for the other liquids that you want to bring along. We have taken prototype bags all over the world and they seem to stand up to lots of abuse.