AbsoluteApril

What is your general procedure for using heat packs when shipping reptiles?

I'm talking about actual 40 hour heat packs for reptile shipping, not those useless little hand warmer things.
I use UniHeat

This is what I do:
activate heat pack
leave on table until it's heated up
poke some holes in a sheet of newspaper
lightly wrap heat pack in one layer of newspaper
Attach to inner lid of Styrofoam box, using a strip of tape on the ends of the newspaper to hold pack in place

I also put a few holes in the Styrofoam to promote some air movement but I do not put holes though the outer shipping box.

Reptile in bag or deli cup, not in direct contact with heat pack, cushioned with crumbled paper.