3. Paint the outside of the carton
white. The white paint will
reflect the sun and keep the
box cooler.
16-5
4. Cover the inside with plastic to
keep water from getting into the
insulation.
Now you can put ‘cold dogs’ (ice
in tight containers) and vaccines in
the box.
Pui more plastic over the cold dogs
and vaccines to cover them.
Put more insulation on the top, and
close the box.
Always keep your cold box
in a cool, shady place.
‘COLD DOGS’ FOR KEEPING THE COLD BOX COLD:
Putting ice directly into the cold box is not a good idea because it makes a mess
when it melts. The ice can be put in plastic bags, but these often break or leak. Here
is a better idea for making ‘cold dogs’.
• Find an empty container made ol plastic or metal. DO NOT USE A
GLASS CONTAINER. (Guess why not.)
• Fill it almost full with water and close it tightly.
• Keep it in the cold part of the refrigerator {not the freezer) until it
becomes cold.
• Put it in the freezer part of your refrigerator about 1 day before
you want it to be frozen.
• Always have plenty of cold dogs in your refrigerator and freezer
before you plan to send vaccines to nearby villages. They will be needed to keep
the vaccines from spoiling.