Polar Tech Thermo Chill Expand-em series insulated carton with foam shipper. The perfect container for shipping everything from gourmet chocolates, cheesecakes, pastries, beef filets and other frozen or refrigerated foods. The Expand-em Series is designed to meet a full range of shipping needs. The distinctive "common" top and bottom style with easy-locking seal create multiple possible shippers from only two pieces. The Expand-em Series provides an affordable alternative for customers with storage restrictions as well as variable height sizing requirements. Simply add a lid to a lid or a lid to a base or a base to a base. Always allow room for your refrigerant packs or dry ice to help ensure your perishable product's integrity upon arrival. Often used with our Re-Freez-R-Brix foam refrigerant packs RB603, Ice Brix IB24 and Ice Brix IB32. Interior measures 12-3/4" length by 12-3/4" width by 12-1/2" depth. Outside measures 15-1/4" length by 15-1/4" width by 15" depth. 1-1/4" Wall thickness. Ideal for 12" cakes.