Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: Is this a double walled mug?
Document: I love these for my Moscow Mules. This brand is the least expensive and a great value for a copper mug.
I absolutely love this mug. It is very attractive and I will use it for a number of beverages, including water.
It is apparently the same mug with Oggi on the the bottom of and the same handle. I have watched the price increase here on Amazon until it reached a new high of $100.00 today!! !
Appears to be a good mug for Moscow Mules although the inside lining is not copper, which some authorities say is necessary to get the full appreciation of the flavor of the Moscow Mule. I will first try it with just beer and see how everything holds up.
My wife surprised me with this mug as a Christmas gift. I had always mentioned when we'd be out for drinks how I wanted one of these, but we could never seem to find them in stores. The mug is solid, heavy duty, and sharp looking. Makes for the perfect vessel for a Moscow Mule or Dark and Stormy.
came individually packaged in boxes and wrapped in tissue so they arrived free of scuffs/scratches. they are a great weight, look more expensive than they were and my boyfriend was thrilled to receive them as a gift. will purchase more to add to the collection!
We ordered 2 mugs then ordered 2 more a few days later because they are great quality! We love serving Moscow Mules in them!
These are great cups for serving the delicious Moscow Mule drinks. Highly recommend, especially for the upcoming summer months! Thanks Oggi.
The thumb support is triumphant.Cup is big and holds a lot of liquid.I don't know if this is real copper but it looks pretty neat.Only thing is the copper shine on the outside chipped off a little bit, but it's unnoticeable.
The rim has a lot of black solder.Can not be removed.Kind of spoiled the nice copper.
Answer: it appears to be double walled