There are plenty of camping cups out on the market. They come constructed from a wide variety of materials. Such stainless, titanium, and enamel coated ones. I typically try to stay with the stainless style that will nest with a 32oz civilian canteen (like Nalgene or Klean Kanteen's). I have been running a GSI Outdoors model that cost around $10 and it works very well. Not a bad price for a stainless canteen cup. However, a few weeks ago I was in Wal-mart perusing the camping isle and ran across one exactly like my GSI model. It had an awesome price of $4.88; a true bargain.
If your in need of a canteen cup, head to your local Wal-mart and pick one of these up. If you don't have a one close by or would rather pick one up online; check out the link below: