Thick bag as slide

I have carried a plastic bag with me when hiking in the mountains. I use it as a slide when I happen upon a piece of snow “snölega”.

It is light weight, does not take too much space and can be useful for 1000 other things.

Why not make a slightly heavier/sturdier for use at home, in the regular slope.

It is small enough to stay in the car trunk all winter of one discovers a slope when traveling from point A to point B.