Korea Starbucks Nastan Tumbler 355ml The Nastan Tumbler is convenient for carrying on the go, with a compact 355ml capacity and a foldable handle lid. The powder coating finish enhances surface durability, making it resistant to scratches and stains. With its high sealing power, it is leak-resistant even when shaken, allowing you to carry it in your bag with peace of mind. The stainless steel double-wall vacuum construction provides excellent heat and cold retention.