Food grade 304 stainless steel inner liner, corrosion resistant and odorless. Contains a water-blocking silicone ring, 360? sealed and leak-proof, safe from side leakage. The most outstanding feature of the thermal mug is its powerful insulation effect. This thermal mug uses a 7-layer temperature locking process and double-layer tail-free evacuation technology to reduce heat loss. The rounded mouth of the mug is smooth and rounded for easy cleaning. The non-slip bottom of the cup is designed to be stable and wear-resistant without tipping. Food silicone ring inside, sealed and leak-proof, long-lasting insulation. A variety of capacity options to meet more needs. Welcome companies to customize the exclusive logo for the best way to promote your brand. Measuring 6.69*2.68 inches, this custom 12oz double wall stainless steel milk bottle thermos. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization: Logo printing available with multiple packaging and color options. Product Highlights: BPA-free, leak-proof, travel-friendly.