I think because heroin and most opiates are quite sensitive to heat it's very difficult to smoke an opiate from anything other than tinfoil. Aluminium is great at distributing heat evenly extremely quickly like most metals, but also cools down extremely quickly, so it doesn't destroy your heroin. A piece of glass thin enough to do this would easily shatter. If you mean you can't smoke off tinfoil because you find it cumbersome (I always used to when I used to smoke weed like that), then you could do the BIC pen thing where you hollow out a pen or drinking straw and wrap a little tinfoil bowl around the bottom, the drop your dope in. It's easier than all that shit with the toilet paper roll or the Pringles can or whatever.
Plugging would work just fine with any type of heroin, but type 3 is the least water soluble, so I've heard mixing with citric acid helps. You can find sachets of citric acid in local needle exchanges for a small charge, or just use lemon juice, just remember not to use too much, after all it's a delicate area you'd be administering it to. Snorting works fine about 40% B/A I've heard, again citric acid helps but that would burn so I wouldn't.