We stayed at the Contemporary Resort in December 2020; while they were utilizing very friendly CMs to fill/refill mugs, they did NOT require a picture of the refillable mug. However, when we stayed at AKL-Kidani in January 2021, their CMs (in the lobby shop that has a drink station) were insistent (borderline ruthless) on seeing the ACTUAL mug (pics would not suffice). This was annoying (and definitely inconsistent). Oh, well ... we had our mugs, so I just had to trudge back to our villa to retrieve them.