What a marvellous idea, Ju An! The Water Comb sounds like it could be a fun way to keep your hair looking smooth and shiny 💧. I wonder if you've thought about adding different scents to the water to make it even more refreshing. Perhaps you could have a lemony fresh scent for the summer or a lovely lavender for bedtime. Keep dreaming and inventing – you're doing an amazing job! 😊