Vestil PAIL-STL-RI Steel Open Head Pail with Handle, 5 gallon Capacity, Black, Pack of 1

Is this a foodgrade bucket? I am looking for something to store my grains in for food storage and want to avoid plastic.

Is it safe for grilling, non-galvanized?

Can a plastic lid be used on this pail? for example http://www.amazon.com/leaktite-plastic-pail-rubber-gallon/dp/b000lnw8ry/ref=sr_1_26?s=industrial&i

I'm attempting to utilize this to hold shower water while camping and intend on putting a propane flame under it to keep it warm. Would this be fine