Anytime we take a trip to the pool, I am always putting on music on my phone and carrying a water bottle. Now, I only have to tote this water bottle and save battery on my phone. This water bottle is such a neat invention. It is definitely unique - I had never known this existed. This water bottle is the perfect size for personal use however, I wish it were a bit bigger to hold more liquids. The good thing is that it fits the hands just right. The bottle holds cold and hot water very well. It heats up fast and stays cold for a long time. The music box is awesome. It is very good quality. The sound comes through perfectly and you can hear it from a good distance. It is easy to use. Although I love this contraption, I am very scared of ruining it with liquid attached. I don't know how to drink and not spill it accidentally and possibly ruin the speaker. Or, even cleaning it and not getting it soaked. It's gotta be very careful maneuver to maintain the product. Hopefully, it's insulated very well to keep things working.