I've never tried silicone, but I do have one ripstop nylon-style sandwich wrap thingy; however, it was from some free promo thing and is meant for a packed lunch only. So that one was pretty cost-effective, haha.
For freezer stuff, I've had the same box of gallon ziploc types for probably 2 years and it's still half full because I wash and reuse whenever possible. It's not a no-plastic deal, but it's much reduced and clean damaged ones can be recycled (ostensibly). And it's cheap.
I also reuse bags from things like carrots and bread that can be rinsed easily, and any rare ones I still get from the produce aisle (like for small things such as nuts). Fridge only on those, of course.
So, yeah, that line between spending and saving money vs. plastic.