Vials are vile. Had to say it. Unless they are attached directly to a vaporizer of course. Then a vial makes sense.
Try glass cosmetic jars. Lots of suppliers. Also small specimen sample glass works. Can be found from some scientific suppliers in relative small and heat tolerant (pyrex and its equivalent) forms.
Otherwise you're looking into metal. But unless you find some good high grade stainless steal, there is a strong potential for leeching from the BHO. No sense smoking trace lead and other nasties. Even nickel from the stainless can be leeched out though it is not nearly as harmful as the Pakistani mystery metals.
I've seen people hand out the plastic equivalents mainly because of the price factor. I guess at even $70-100 a container, you have to make sure you squeeze people for that extra $.75 cents.
Example cosmetic:
1/2 Once round cosmetic jar. Glass. Frosted to cut down on light but all these clear things need to be stored dark of course.
Definitely cook it down slightly if possible. Lot of people use sunlight to solar assist, but I dont like the potential degradation from that much light. Outside for sure, or a hood, I'm just not a fan of sunlight directly. Though it would almost make sense to make a solar oven for this process. Glad I wrote a reply. Now to the sketch pad for a concept ... how to regulate the temp seems like a place to start ...
/edit 2.0 ::: And prefered commercial extractor product, not a plug or sales pitch, just informational:
Okief Stainless Steel extractor