I have a homemade one-hitter for hash oil. Its just a piece of an old radio's antenna, about 3-4 inches long. I put the hash oil in a piece of tinfoil, put it in the end of the antenna, and heat it with the lighter. I put a small plastic tube on the another end of the antenna, for avoid burning my mouth (as the antenna becomes hot very fast).
I never did use it with weed instead hash oil, so i cant give any advice about it. Anyway, i strongly advise to try making some hash oil. Its far healthier than weed, and the effects are FAR stronger... :stoned: