Moe ive made lots of BHO. Some people use PVC but (could be wrong) seems to me using a polyvinyl chloride as a container when running a solvent through it may lead to leeching of unhealthy compounds. So i used copper pipe (flush it good for a while like they do for water systems) basically 1 inchcopper piping cut to about 20 inches long and two end caps copper also. Drill a hole just the size of a butane nozzle in one of them. You want a tight fit. On the other cap drill very small holes like a salt shaker pattern. This is the end fluid will come out. I put a small piece of coffee filter on the inside of this end.
There is only one grade of plastic pipe that is ok to use with butane, it's CPVC, it's the same plastic they use in the honey bee extractor. Copper is not a good choice either, it leaches certain metal compounds when exposed to butane. I'd only recommend stainless, brass, or glass, and the best glass is pyrex due to the extreme cold (I had a standard glass tube break in my hand, was extremely lucky to not get cut up real bad).
Now I only use SS, I have a turkey baster for small loads, and to do thin film method of drying. Shiva mentioned the lack of terps in bho and that is due to heating the oil to work the butane out. That's why I like the thin film method, because the oil never gets above rm temp. It takes a couple of wks for the cure, but you'll end up with all the fruity, sweet, sour, or whatever flavors.
For larger loads I use a modified 12oz "Kleen-Kanteen"
I carved out the plastic on the cap, drilled holes in the lid and one in the bottom of the canteen. The screen is from an old french press coffee maker. I used a small brass machine screw to hold the screen to the inside of the lid. I cut a place a piece of coffee filter between the screen and the lid. The screw extends down about 3/8" below the rim of the lid, this way I can just set the screw end on the pan bottom and spray through, and not have to put the death grip on the frozen can, I get a lot better control, with no freezing butane splatter. In use below.
