Reusable water bottles are happiest with a small care routine. Rinse the bottle after use and leave it open to air-dry fully before putting it away.
Do not forget the lid
Wash the lid, spout, and seal where moisture can collect. A soft bottle brush helps reach the inside without scratching the surface.
Always follow the care instructions for your specific bottle. Consistent cleaning keeps the bottle ready for the next school day, outing, or desk-side refill.