Anchored Tumbler Maintenance
1.  Preparation: Start with hot soapy water. A mixture of warm water and a mild detergent or dish soap is perfect for this task.

2.  Cleaning the Main Compartment: Use a bottle brush to scrub the inside of the tumbler. Ensure to reach all areas, removing any coffee or tea stains.

3.  Lid and Small Compartment: For the small compartment lid, use a narrow brush or a straw brush. This ensures that no soap residue is left in hard-to-reach areas.

4. Rinsing: Rinse thoroughly with hot water to ensure all soap is removed.