Subject says it all. Glass costs $5 more per liter.
I've read PG shrinks as it gets toward 0ºF?
Does HDPE get brittle at that temperature?
Which is best in your experience? Thanks!
I've read PG shrinks as it gets toward 0ºF?
Does HDPE get brittle at that temperature?
Which is best in your experience? Thanks!

I did leave a small space at the top of the bottle.