The most effective closure for keeping odors in is a rubberized zipper or a zipper with velcro, and some bags also have a foldable top edge. Most smell-proof backpacks that are worthwhile also contain an activated carbon filter or liner in between the outer shell and interior lining of the bag. Get full guide of
Smell proof case in just single click please click here, Can drug dogs smell smell proof bags?
Although man's best friend tends to have a pretty incredible ability to sniff things out, dogs cannot smell though airtight, vacuum sealed containers. Pups can smell under things, around things, into things and even things underwater. However, airtight containers are vacuum sealed, keeping any air from escaping.