I am interested in locating suppliers of specimen mailing packages 
(preferably total packages) I am looking for a company that can provide 
prefilled containers with addressed packages that meet all postal and 
shipping regulations. Basically I would like to hand our distant clients a 
user-friendly all-inclusive solution that makes it easy for them to 
package, label and post specimens to us.

Anyone encountered any companies supplying these types of items?

Bert