Key Product DetailsMaterial: Most versions are constructed from 316-grade stainless steel on the interior for high durability and rust resistance, often with a double-walled vacuum design.Capacity: Commonly found in a 350ml size, making them portable and suitable for on-the-go use in backpacks or gym bags.Design Features:Mushroom-shaped lid that provides a sleek, modern aesthetic.Silicone accents are sometimes used for a soft-touch grip or base.Available in various pastel and matte colors, including light blue, pink, and gray.