Maxpak manufacture these types of bags, which are designed to protect the integrity of the items inside from external interference. Once sealed, any attempt to access the bag will result in the bag's Tamper Evident features making the intrusion clear.
The Tamper Evident Bags website is a good source of information for Tamper Evident Bags, as is the video on our YouTube channel (below). If YouTube Channels are blocked on your network, then try our Tamper Evident Security Bags Video Page.
Packaging, Environment and Legislation Observations from Maxpak
Environmental Packaging, Plastic Bags, Paper Bags, Shopping Bags, Cleaning Wipes & Products, Garbage Bags & Liners, Packaging & Cleaning Products