Rust-Resistant,304 Food-Grade stainless steel makes up the inner and outer wall.Our tumblers with lid and straw are also 100% BPA free,to make sure that they are safe to your health.The diamond surface design makes this water bottle unique,You will enjoy the difference in the people. It also makes the mug easier to grasp.17Oz Capacity,no need to run back and forth time and time again.This capacity makes our stainless steel tumbler to satisfy your every demand for beverages:iced coffee, milk, beer,juice,soda water.Come on,Enjoy drinking! This custom 17oz-iced coffee travel mug. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Tailored branding: Supports logo imprint and design personalization. Product Highlights: BPA-free, leak-proof, travel-friendly.