From Sentry Solutions: Tuf-Cloth
“Tuf-Cloth

The lint-free replacement for oil and silicone rags. Non-toxic dry film corrosion inhibitors and lubricants provides a fast-drying, water-displacing MICRO-BONDING CRYSTAL BARRIER against rust, friction and wear.”

From the Tuf-Cloth/Tuf-Glide User Manual:
“Rust Protection-
Sentry Solutions’ TUF products are fast drying replacements for oils, silicones and traditional corrosion inhibitors. TUF-CLOTH™, MARINE TUF-CLOTH™ and TUF-GLIDE™ provide dry bonded, non-toxic protection against rust, friction and wear for all types of outdoor gear and tools.”

… and…

“Can I use my TUF-CLOTH treated knife to cut food?
TUF-CLOTH’s dry bonded protection is non-toxic. The bonding reduces any transfer to food items cut. If you plan to cut food with a TUF-CLOTH treated blade, we suggest that you wash or wipe the blade first, and then reapply when convenient.”

With that said, I wouldn’t exactly wad up the Tuf-Cloth, stick it in my mouth, and suck the juices out of it in a moment of thirst.