drum up

verb

1. To generate or encourage; to campaign for.

   “The candidate gave speeches, shook hands, and kissed babies in an effort to drum up support before the election.”

   “From 1910, to drum up custom, the Metropolitan would operate a luxury Pullman service from Verney Junction to Aldgate.”

2. To prepare food or drink with improvised implements, e.g. while camping; especially, to make tea in something other than a tea kettle.