Use it to cook food on it for +21% bonus cooking experience and a 5% chance to produce double cooked food.
Notes:
It remains active for 5 minutes once deployed and can be used by anyone in the vicinity. There was an increased chance of receiving these during a promotion from 2/05/2014 until 6/05/2014.
There is an increased chance of receiving these during the promotion running from 29th October 00:00 UTC to 3rd November 23:59 UTC.