Most survival resources favour shelter as first priority. Hypothermia hits quicker than dehydration. Other people prioritise fire. Each to their own. Personally I like to know as soon as possible I have a shelter in case the weather turns quick. If it hammers down with rain, I crawl into the shelter. If I build the fire and it hammers down with rain, I have no fire and no shelter. You do feel exposed to the elements. The shelter for me is a primary fail safe. If it all goes wrong I can get in there and wait it out.
I didn't use the glass bottles as I suspected they might explode from thermal shock in the fire and I would end up with a face full of glass. My plan was if I didn't find a better container, to risk the glass bottles. Hope that makes sense.