I have seen a U-tube about Bongo alcohol stove, and was surprised at its (relative) complexity compared to a straight penny stove.

So, please someone tell me: Does the Bongo stove have any advantage over the sterno can (which is basically a ready-made alcohol stove)??

Question #2 :
Can a sterno can be refillable ?? I mean the alcohol is consumed, and maybe the gel is left, can I just add HEET and reuse ???