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The Milton Elfin 300 Thermosteel Flask is a sleek, 300ml stainless steel bottle featuring double-walled vacuum insulation and an inner copper coating to keep beverages hot or cold for up to 24 hours. Crafted from durable, food-grade 304 stainless steel, it is rust-proof, lead-free, and designed for easy portability with a leak-proof lid, making it ideal for office, travel, or daily use.






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