This is a black 30 oz. Polar Camel ringneck tumbler with clearly plastic lid. It is made of stainless steel and features the guidon for the B Company of the 75th Ranger Regiment 1st Battalion on one side. 

The tumbler is in excellent condition with minor wear (while pre-owned, I'm not sure if it was actually used). 

See pictures for more details.

If you have any questions, please let me know. Thanks for looking!

Note: I believe this tumbler was originally made by Scroll Factory, a Ranger-owned enterprise. If you're looking for similar items, check them out.