I have very limited experience with “silicone ziplocks.” You definitely pay a weight penalty. And cleaning them can sometimes be much more difficult than you might expect. Here is a decent description:
https://www.thespruce.com/how-to-clean-reusable-food-storage-bags-5093601
Plus you can not recycle silicone bags when they are at end-of-life. Not sure what Stasher does when you return their bags for “upcycling,” and they don’t say. At least “recycling” clean polyethylene bags is relatively straightforward in many locations. But they never get turned into new plastic bags, usually composite lumber like Trex.
I would be cautious about using any bag material that is not “food grade,” including nylon or DCF. And DCF can develop micro-cracks from flexing, which can lead to liquid leakage or make them tough to sanitize.
I have considered using waxed-paper bags. If made properly, they are biodegradable, compostable, safely burnable, and sometimes recyclable. Haven’t tried them yet for backpacking.
With careful use and simple cleaning, thicker polyethylene freezer bags can be re-used several times without much weight penalty, reducing their impact.
Depending on your needs, I have re-used Ziploc Twist’N Loc containers many times for backpacking. Similar re-usable containers are available in a wide variety of shapes and sizes.
HTH.
— Rex