Feature: 1. 304 STAINLESS STEEL: These cups are made of 304 stainless steel, high temperature resistance, and no deformation, which is safe and healthy. 2. DOUBLE LAYER: These stainless steel cups are double layer design, which effectively insulates and prevents burns, with good heat preservation. 3. STACKABLE DESIGN: These metal cups are stackable to ensure orderly storage, equipped with storage bag for easy carrying when going out. 4. SPECIFICATIONS: Includes 4pcs stainless steel cups, single cup capacity of 300ML, compact and lightweight, suitable for indoor and outdoor use. 5. APPLICABLE SCENES: These portable cups are suitable for outdoor camping, tourism, hiking, beaches, picnics, etc., convenient and practical. Specification: Item Type: Cup Set Product Material: Stainless Steel Application: Suitable for outdoor camping, tourism, hiking, beaches, picnics, etc. Capacity: 300ML Upper Diameter: Approx. 8cm / 3.1in Lower Diameter: Approx. 6cm / 2.4in Single Height: Approx. 9.5cm / 3.7in. Package List: 4 x Water Cups1 x Storage Bag