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I use a bottle to smoke hash, but in a somewhat different way. I get a piece of tinfoil, put the hash over it, then put another piece, smaller, over the hash, to prevent it spills when heated. Then i make one hole in a plastic bottle, put a pipe (like a pen or somewhat like) through this hole, put the tinfoil in the bottle's mouth (i use that plastic ring attached to the cap of the bottle to fix the tinfoil), then put a fire under the tinfoil and suck by the pen. If the fire is far enough from the tinfoil, it will vaporize the hash without melting the bottle, assuring the temperature is insufficient to vaporize the aluminium, and preventing any harm for smoking with tinfoil. And smoking this way permits the smoke expand before entering the lungs, lessening the burning and allowing to smoke more :stoned:
This is a thing thats easier to do than to explain how to do... at least for me... anyway, if there is something unclear in the explanation, feel free to ask! :thumbsup: