Yep, I have more than one also.  I don't have any in "tin", but I have both stainless and a few in Ti.  The Ti Snow Peak 450 double wall mug is used daily.  The 700 not so much, but it's a better all-around mug for cooking, eating & drinking.
_________________________
Better is the Enemy of Good Enough.  
Okay, what’s your point??