Now that is really interesting! I will definitely have to look into that. I must admit, though, that it makes me sort of nervous how they just tacked onto the end that it is food-grade. From my understanding, it is quite a procedure to get something FDA approved as food-safe, so it's usually a heavy selling point. However, it could be that the food-safety test was a side test they did to get it approved, say, for use with babies, so they don't understand it's selling attraction. I also wonder who it is food grade with? FDA? Oeko-tex? More research, says I! This sounds like a great lead though, definitely one of the best ones we've had so far.
I've used a zipper before and haven't had any leakage...of course, I did not keep the bag full of water upside-down for hours, but for at least a few minutes no water got through. Not sure how medically safe it would be, of course...
Thanks for all the nice comments! Unfortunately, I can't tell you what the pattern number is because half of my stuff is in storage right now, including all my patterns. I used a regular zipper because I did not have an invisible. Thanks for the zipper insertion idea, Scrappy Sue! I'll definitely try that.
I found a Vintage 50s pattern for a cute summer dress and whipped one up out of brushed cotton in a safari-esque pattern. I'm pretty proud of how it turned out, it was my first time with a few of the techniques (including making and inserting my own piping, which was a pain). I ended up pretty majorly altering the front, from two darts on each side to a side bust dart plus princess seams up the front (this was a result of not making a muslin, something I will definitely do next time!). I ended up taking the hem up a good bit as well--it was definitely a tea-length for someone much taller than me, so I took it up to make it hit just above the knee for me (one of my favorite skirt lengths). I know the zipper isn't as smooth as it could be--I'm still trying to find a zipper insertion method that works for me. Let me know what you think!