i would say get some pvc with end caps that the bottle can fit into... i wonder what the temp swings of concrete would do to bare glass.
"Back when I was in the pen, I used to beat my meat..."
"Damn ye, yellow-bellied sapsuckers; I'm a better man than all of ye milksops put together" - Blackbeard
"...I have really good sex moves; that I learned in China. I'm a sexual tiger; and feed on va-gine-a." - Jon Lajoie