The Snow Peak mugs are amazing, however they don't come with a lid which has always annoyed me!
This lid snaps on perfectly, so you can store other items inside your mug when heading out.
The lid is very thin adding only 4g to your kit - 4 of the best grams you can take if it means lighter when you get to camp.
Working on the 450 and 600ml versions as well as a toaks version.