My hamster is dehydrated, how to rehydrate?

My hamster is dehydrated because her bottle leaked and she didn't have water for a day. Now she is rolling on her back and very disoriented. She has spasms of moving quickly and then just staying still. I already filled up and placed several water bottles with vitamins in them around her cage and gave her a leaf of lettuce and a few apple slices. Is there anything else I can do to help her recover, it's already been 5 hours and she's still a little disoriented.