The 316 stainless steel inner liner ensures safe drinking, while the 201 stainless steel outer shell provides durability. Its food-grade material guarantees safety and durability while the uniform spray-painted exterior offers scratch-resistant wear-proof protection. Advanced vacuum insulation keeps drinks hot or cold for 6-12 hours. The durable construction withstands daily use while maintaining its refined look. Whether for personal use or as a thoughtful present this thermos delivers reliable performance across all situations.The capacity of the water cups is 7 ounces and 10 ounces.