Does speed last longer than coke and does it have the mild euphoria and cost less. Maybe that would be better.
First of all, you're going to be asking about "shards", "glass" or "meth". The term "speed" is waaaaay outdated. At least if you're in the US. Speed pretty much only applies to pharmaceuticals like Dexedrine and Adderall anymore in the US.
A $20 dose will last anywhere from 6-12 hours. It does provide a euphoria, although much less intense than a good cocaine high. Cocaine can't even compare to the cost effectiveness of methamphetamine.
its cheaper, you get more of it ( ok is it just me or is a gram of coke smaller than a gram of speed)
Weight is weight. If two substances of the same weight look different, the one that's smaller is just more dense.
and you can mix it in with your coffee and it will last waaayyy longer than coke.
Snorting and smoking meth makes sense. Even eating it makes sense. But I don't understand why you'd bother putting it in coffee..