We have received many questions about the effects of the freezing cold weather on eJuice shipments that are left in outdoor community mailboxes for hours at a time before they can be picked-up and so I thought that I would take a moment to address this question through our blog.
Due to the PG content in most eJuices, eJuice will not freeze. It will however get thicker and the ingredients may separate until the eJuice is warmed-up. eJuices containing 100%VG may freeze if left outside for a while, but this does no harm to the eJuice. Many people have frozen their eJuice to give it a longer shelf life without any negative affects (although we do not recommend or endorse this practice as we believe that fresh is best when it comes to eJuice). Cold is actually better for eJuice than heat, so if your eJuice has been sitting outside in freezing weather, all you need to do is let it warm up for approximately 48 hours before you vape it so that it will flow properly into your wick.
For more information, the following forum post is a good place to start: