Water Injection for Insulation: The detachable stainless steel inner lunch container can be filled with hot water to keep your food warm. Microwave Safe: This leakproof lunch box is microwave-safe. Food-Grade Material: The interior of the thermal lunch box is made from high-quality food-grade 304 stainless steel, which is corrosion-resistant, rust-free, odorless, and easy to clean.
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