New Four Layer Stainless Steel Portable Folding Cup Convenient Telescopic/Folding/Scaling/Flexible Cup Magic Kettle Large Applicable: often go abroad business personnel, travelers, island Tours, etc. Specifications:Diameter at the top is 2.76",After opening height is 3.35";After folding,the diameter of is 2.95",height is 1.18". Capacity:about 250ml.