What is an economical way to keep the SPMD cold during the return shipment?

Exposed SPMDs returned to EST for dialysis must be kept frozen. This can be accomplished by placing the carriers holding the SPMDs in their original cans and packing them in ice. Plastic or styrofoam coolers and plastic lined boxes can be used for transport .

The most economical source for ice is one-liter plastic soda bottles of frozen water. These will adequately cool the samples and can be discarded after use. More.

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