[Tagging] Barbecue disposal bins

[Dave F]

Hi

Communal bins in parks etc for the disposal of hot ash or single-use 
tray barbecues. Unable to find the appropriate tag in the wiki or 
taginfo. Suggestions?

PS
Is anyone as irritated as I am by the shortening to 'bbq'. It seems to 
serve no beneficial purpose & consensus/convention is that OSM doesn't 
abbreviate. It is never too late to change poor tagging.

DaveF