THERMOS "Yama-Sen" Stainless Steel Bottle 500ml, Clear Stainless "Yama" Bottle designed for harsh mountain conditions This bottle was created with the many demands of mountain environments in mind. It's a "Yama" bottle with a secure grip body ring, a shock-resistant bottom cover, and enhanced heat retention and durability. Due to its construction, I never drank directly from it, and used it as a pot several times. I put hot water in it around 5 a.m. in the snowy mountains, and then poured it into a mug at the summit at noon to drink tea. Thanks to the cover, the water stayed hot. I used the 500ml size to save weight, but it was sufficient for my needs. [High Heat Retention] It adopts a 36mm diameter, prioritizing heat retention in autumn and winter mountains. Keeps heat retention for a long time. [Non-slip Cup] The combination of two materials with different hardnesses enhances grip. It has a wide and stable bottom shape. [Double Screw Cap] A simple screw cap that is easy to clean, even with high-calorie drinks that tend to be sticky, such as those with honey or sugar. [Body Ring] A silicone ring with high grip. Easy to handle even with gloves on, and reduces damage if accidentally knocked over. [Lightweight Design] Lightweight design that reduces the burden on your luggage. Removing the body ring and bottom cover makes it even lighter. [Bottom Cover] A silicone bottom cover that softens the impact when dropped. Also prevents the bottom from being scratched. Ideal for those seeking weight reduction and heat retention. ⭐︎Bonus Three THERMOS stainless steel double-walled insulated mugs (250ml) are included! (Only one photo is shown)