Extra Thick Aluminum Outdoor Camping Heatable Thickened Migrant Worker Old-fashioned Lunch Box

[Quick Refund] Usage Notes: Pure aluminum product, before first use it is recommended to clean with tap water and dish soap using a sponge ball directly. Do not use steel wool for scrubbing, and avoid boiling water or disinfectant water to prevent the aluminum lunch box from turning black or yellow. This is a characteristic of pure aluminum products. The blackening and yellowing actually occur because aluminum reacts with iron salts from tap water, displacing iron and adhering to the aluminum lunch box. If it turns black or yellow after initial use without proper maintenance, don't worry; we can clean it with vinegar or boil it several times with acidic foods like lemon or tomato.