After seeing the beautiful lathe turned coffee cup a member of my site posted in my Turning board yesterday, it gave me incentive to try a first coffee mug on my RM .
Titebond 111 for glue. Shellac sanding sealer followed by 3 coats of lacquer .
I wouldn't even try to use a thin wood mug for either hot coffee or cold liquids. It surprised me how that handle attached amazingly strong but just the weight of the mug full of liquid would probably be too much for extended use and someone might get hurt by having hot coffee dumped all over them.
When selling those I would strongly state that it is not to be used for any kind of drinks or liquids but just for either ornamental/decorative use or to fill with something light in weight like candies or nuts etc.
Might also look nice on an executives desk to hold pencils and pens and felt markers etc.