Has anyone tried mylar bags for survival kit water containers? The one's I'm thinking about see use in packaging electronics (circuit packs, etc.) I'm looking at one that a motherboard came shipped in. Anti-static, smoky gray translucent. Tough as nails. I can't imagine accidently puncturing or ripping this thing - it would take a starter cut with a knife to get a rip going. This thing would fold up nicely and could be attached to the outside of an Altoids tin kit - it would probably take up too much room inside.

Is this mylar stuff, or whatever it is, non-toxic?