What exactly is a scuttle? I've seen the new ones some other members have been posting and they seem to get great reviews so I was considering trying one.

How do they work exactly? They always seem to look so different from one another. Is it just a hot water surrounded soap dish to keep later warm or is there something else to it?

Lastly, where can I look at a few different varieties? I've seen some on SRD but haven't noticed them anywhere else.

Thanks!