a cooler with two gel packs held under eight

not the door

is there a difference in stability between the compounds

unopened and in-use in the same place is fine. just keep the in-use one where you can reach it

i would use it

how cold is too cold, can it actually freeze in a normal fridge

freeze thaw cycling is the risk, not one freeze. that is my read of it anyway

lyophilised powder is genuinely robust. a warm transit is far less likely to matter than people fear

i log the fridge temperature daily and the room has never let me forget it

is a five pound fridge thermometer actually worth it

the door swings four or five degrees every time somebody opens it. the back barely moves