My 73 year old Mom will be going with us to Disney in May!!! Fourteen years ago she had throat cancer and had to have radiation, she now has some difficulty in swallowing and must have a drink of water for every bite she takes. So she must have plenty of water. So far I've made PS at 'Ohana, Liberty Tree Tarven, Rainforest Cafe and 50's Prime Time cafe, should I just tell the waiter when he comes to take our order and do you think we will have any problems with them keeping will keep my Mom's water refilled???