Share 'What was the best thing you packed for your birth?'

Hi,   I am a doula and the owner of a newly launched company called YourBirthBag.com.  It is a webstore that sells items for moms to pack in their backs for birth...along with great bags to pack everything in.    What was the best thing that you packed for your birth?  Was there one item that you couldn't live without?  What could you have done without?   As a doula, I am really loving battery op…