Keeps food and drinks at the right temperature: Threelayer insulation technology preserves cold for up to 12 hours and keeps food warm for over 6 hours. Stainless steel inner container with a doublewalled structure supports reliable temperature retention (typical performance 6–12 hours depending on contents). performance insulation materials: PU foam core provides low thermal conductivity and effective insulation to slow heat transfer. Designed to maintain beverage and food quality without an active heating function. Secure, leakproof construction: Vacuum flask design with a sealed silicone ring and clip closure delivers 100% leakproof performance to prevent spills and protect bags or storage. Tight seal also helps preserve freshness and stable temperature longer. Durable, foodsafe interior: Precision stainless steel inner container resists corrosion and is easy to clean. Doublewalled stainless steel improves both durability and insulation. Practical for everyday use: Ideal for keeping milk tea, coffee, juice, soups, or prepared meals chilled or warm during transport. No external power required — passive insulation for onthego convenience. Common use scenarios Commute or office lunch: Bring hot soup or coffee that stays warm through the morning, or chilled beverages that remain cold until break time. Travel and outdoor activities: Carry chilled juice or refrigerated meals for picnics, hikes, or day trips without worrying about leaks or loss of temperature. Childcare and feeding: Store warm baby food or cold formula safely when you're away from home, relying on the sealed, insulated design. What this solves Eliminates shortlived temperature retention from singlewall containers. Prevents spills and bag damage with a secure, sealed closure. Keeps food and drinks at a safe and enjoyable temperature without needing outlets or batteries. Materials and performance summary Insulation: Threelayer construction with PU foam core. Inner container: Precision, doublewalled stainless steel. Temperature performance: Cold up to 12 hours; warm for over 6 hours. Seal: Silicone ring and clip design; leakproof vacuum flask construction. Function: Passive thermal preservation only (no heating element). This product is designed for reliable temperature retention, spill protection, and everyday convenience for beverages and prepared foods.