Regular Heat Packs For Transporting Fish?

[flying_jack]

ive been posting fish for some time now, and buying the fish ones is abt expensive.

Do the normale human heat packs work in the same way? The ones you use for an headache etc. They are alot cheaper, and easier to get ahold of.

 

[flying_jack]

bump

 

[BigC]

I dont think it's any more expensive for a shipping warmer
http/www.heatpacksuk.co.uk/shipping-warmer-heat-packs.php
Regards
C