Wenxian Children's Insulation Stainless Steel Bouncing Lid Water Cup $ 16.58 Product information: Style: bouncing cup with straw Liner material: 316 stainless steel Shell material: 201 stainless steel Insulation performance: 6-12 hours Material: 316 stainless steel Style: Cartoon Function: heat preservation Applicable people: children, students Capacity: 500-600ML Size information: Packing list : Stainless steel water cup*1 Product picture: