I wondered, in the case of a formal 'sang' offering, if there is any particular advice about what form of burner to use.
Some clearly get caked up with tar etc really fast and just don't work well.
I've seen one or two in the form of a gaping mouth which could be Vajradaka or the 'Face of Glory'.
Anyone's Guru given them guidance or is it just a matter of preference?
Here are a few styles I've come across:
Traditional:


Face of Glory (Kirti Mukkha) or similar Vajradaka:

http://www.flickr.com/photos/84265607@N ... 794362829/
Simple chalice - I've seen these in soapstone, stone and metal:



