First off, this is our first vacation to an all inclusive and first vacation to anywere warm. We tend to visit Alaska, so this is a big change for us. I read in forums about people bringing an insulated mug to keep drinks cold. It seems like some resorts use little plastic cups and other have better cups to serve drinks in. I am not really fond of the idea of bringing my own cup, but don't want my drink to get warm within 5 minutes. It this something that is done by many at ERC. If so how does it work. You take your mug to the bar and they fill it up. If you are at a pool or the beach and have drink service, do you still use your mug. I can see using it for water around the beach or pool, but other drinks?