This gym doesn't have water bottles surprisingly. They have a water cooler and small paper cups.

The HR BKK has glass bottles in the gym. Andaz should have the same. I feel HR goes the extra mile for guests toiletries in gym too while Andaz is about as cheap as possible except for 2 things - they have liberal amounts of free suntan lotion and give drinks at poolside for free quite often. These two things are very nice