This topic is one of those "hot potatoes"

.
I'm Johnnie's DW and just wanted to add that during our first stay at WL in 1995, we stopped at Roaring Forks and noticed these mugs (DH didn't want me to buy one either

). I LOVED WL and wanted to get the mug...just because...I liked it.
(My older mug has "Aladdin" brand name on bottom and is the cream/beige color, WL logo, with dark green trim)
I'm pretty darn sure there was a sign saying the mugs were refillable for return trips (to WL/Roaring Forks) or something like that. I believe I asked the CM about this when I purchased one as it was new to me. The CM told me the official policy.
We didn't use it again until 2000 or 2001? and purchased another one (auto-cup type for the car) with the same policy.
We refill our mugs occasionally as it's not a big deal with
DVC accommodations. When we are near Roaring Forks and we think about it...may get a re-fill.
Based on what was displayed and promoted when we purchased mugs, I see nothing wrong with continuing to use our mugs for re-fills or, until they fall apart, LOL. I agree with Granny, I won't be upset if the re-fills stop.
I think the refillable mug thing got abused and Disney had to change their approach. They aren't going to change the policy with the older mugs.