Prisons, hospitals, schools, and airports, all have discovered that our Tamper Evident Bags are a sufficient resource for transporting and storage. With its unique tamper evident seal, which is similar to that of our poly mailers; individuals are assured complete protection against harmful substances. Created for single usage, this bag maintains integrity while storing items such as toxic chemicals, lab samples, pharmaceuticals, and cancer medications. The bio hazard symbol allows this bag to be universally communicated!