I used to use quart-sized Ziplock bags to carry my liquids when I travel. My cheap bags kept ripping, and I couldn’t stuff them quite as full as I wanted to. Eventually, I got tired of transferring my stuff from bag to bag. I decided to buy a sturdy, reusable toiletry bag. I’ve been using this bag for almost two years now, and the zipper works as well as it did the day I bought it!