I haven't used it much, but it's been stored in a drawer for a long time. There is some discoloration around the water inlet. The bag has been washed. How about using it for energy-saving warmth and desk work? A pink hot water bottle with a striped design and a handle, with a cover for high heat retention. - Color: Pink - Shape: With handle, striped design - Capacity: 800ml - Weight: Approximately 200g - Included: With cover Thank you for looking.