refillable mugs

I was just at Aulani for five days, checked out the day before yesterday. When we got there we wanted to buy refillable mugs. We went to Ulu Cafe and couldn’t see any on the shelves. Asked a CM and they said they had removed them from general sale as they were running low on syrup and guests...

Hi! This might seem like an odd question, but can you buy the resort mug without staying at a resort? and if I have an old mug that's from years back, will they be able to exchange it for a new one? (I know Universal have done that for us in the past)

Can anybody tell me what refillable resort mugs look like? I've searched high and low and can't find anything! Then again, I may be looking in the wrong place haha We'll be staying at CSR, if that makes a difference.