Category A Infectious kits The ambient kits must be used as supplied by Bio-Bottle complete with outer carton. For Cat A , you are not permitted by international regulations to place into your own carton. This applies to dry ice or chill packs also. However , due to having obtained approvals, Bio-Bottle dry ice shippers are approved as a complete unit , therefore you are permitted to place the Bio-Bottle ,without the outer carton , into the Bio-Bottle dry ice bin and must use the Bio-Bottle outer carton for that bin.