①. This vacuum coffee mug is made of food-grade 304 inner and 201 stainless steel outer material. The lids are BPA-free and durable, so your drinks are odor-free. ②. The travel coffee mug with lid and straw is designed to prevent messy spills and leaks, keeping your drinks safe and secure wherever you go. ③. This double-walled stainless steel coffee maker can keep hot drinks hot for 6 hours and cold drinks cold for 9 hours, allowing you to enjoy your favorite hot or cold beverage anytime, suitable for work or outdoors. ④. The improved lid has 2 drinking ways: cold drinks can be drunk through a straw, and hot drinks can be drunk by flipping the lid over for more convenience. ⑤. The 510ml coffee mug is a reusable travel mug with a sleek and modern design, a snap-on, one-handed opening and a larger caliber. It's a good gift for coffee and tea lovers, enabling you to easily enjoy your favorite beverages anytime, anywhere. ⑥. The one-handed click lock and larger caliber design combined with the non-slip rubber bottom provide a comfortable grip and a portable travel experience. ⑦. Whether you are traveling to work or on a weekend adventure, stainless steel coffee mugs are a reliable travel companion, offering an easy and durable way to enjoy your favorite beverage. ⑧. This travel mug is thoughtfully designed and comes in matching colors. It's suitable as a Thanksgiving, Christmas and Valentine's Day gift for family, couples and friends. ⑨. The double-walled vacuum insulation construction helps prevent heat or cold transfer, keeping your drinks hot or cold for a relatively long time. ⑩. The ergonomic design makes it comfortable to hold with one hand, and the bottom rubber prevents slipping. ⑪. It's a portable travel coffee mug, suitable for work, travel, outdoor activities and camping. ⑫. With beautiful colors and an amazing design, it's a nice gift for men, women, children and friends.