Is this a set or a single mug?

The product is sold as Banks Diesel Power Mugs, so expect more than one mug in the set. Check the listing's contents for the exact count before buying.

Is it microwave and dishwasher safe?

That depends on the ceramic and the print process used. Standard ceramic mugs are usually microwave safe, but printed designs can degrade in a dishwasher, so check the seller's care instructions.

Does it hold heat well?

It is a standard ceramic mug with no insulation, so it holds heat about as well as any ordinary coffee mug. It is not a travel or vacuum-insulated mug.

Is it officially licensed Banks merchandise?

That varies by seller. If official licensing matters to you, confirm it with the seller before buying, since novelty branded mugs are often unlicensed.

It suits diesel truck fans, Power Stroke owners and anyone buying a themed gift for a mechanic or truck enthusiast. It is a novelty item, not serious drinkware.