I have four refillable mugs fron CSR now, two "normal" size mugs and one super-huge 64 oz mug! My DH is 6'7" and 330#, that mug was made for him!
Anyway, the CSR mugs don't have removeable bottoms so they are great in the dishwasher. They are not great for the car, but I have a hole in my chin so I like the fact that they have lids to prevent spillage. They also work well for water by the bedside. Dust doesn't get into it so you can keep it longer at the bedisde.
On our last trip, the CM that sold them to us said that they were good if you brought them on subsequent trips? Does this depend on who you ask?
D4D