I recently made a pretty frivilous purchase - at least for me. I bought kikic's Glam Bags - Luxe Reuseable Travel bags. They are an "upscale" zipper bag to carry personal products in while traveling. Definitely feminine and more attractive than the brand name or off brand zipper bags, but very pricey. A box of 18 quart size bags retails for $9.95. Glam Bags are not quite as thick as the top name brand, however, nor are they thin, flimsy plastic either. So probably middle of the road. They are definitely geared towards the fashion conscious female who frequently travels.
I have to admit that I have not had the opportunity to travel with them yet, but considering that they are comparable to what we usually use to protect our clothing from spilled personal care products, I am sure they will hold up just as well as the other brands.
If Glam Bags are just the thing you are looking for you may purchase them at http://www.kikic.com/