My husband works with granite, doing granite fabrication. His job can get VERY dusty, so it's very important that he has a drink container with a secure lid to keep all the rock dust out. He likes to take his morning coffee in a bottle of some type to help him rev up his morning. However, a common problem we have is that they don't retain heat for long and they're hard to clean. Coffee residue tends to gunk up in the tiniest little crevices and are a complete nightmare to try to get clean!
The water bottle is made of stainless steel and has double walled insulation. It looks very nice and snazzy and can be taken anywhere.
If you'd like a quality water bottle too, they're available here: