A 300ml stainless steel tumbler with a vacuum-insulated structure that keeps drinks cold or hot for a long time. Thermos Vacuum Insulated Tumbler 300ml Made of stainless steel Vacuum-insulated construction keeps drinks cold or hot for a long time. Shape-wise, it's good for juice or beer. Mouth diameter: about 6.5cm, Height: about 12.5cm In summer, it doesn't sweat even when you put in cold drinks. Hot coffee also doesn't make the outside hot, which is great. Best for outdoor activities and camping! I usually use several of these, and I don't seem to need this one, so I'm putting it up for sale. A purchase sticker is affixed to the back of the box. Thank you for your consideration. - Brand: THERMOS - Capacity: 300ml - Material: Stainless steel - Cold Retention: 1 hour or less at 7 hours - Features: Vacuum-insulated structure Thank you for viewing.