Double-layer vacuum insulated cup, portable, stainless steel, large capacity, straw cup

Inner liner material: 304 stainless steel
Function: Conventional, household, portable, vacuum, thermal insulation, customizable
Insulation performance: 6-12 hours
Outer shell material: 201 stainless steel
Style: Large capacity, car cup, with straw, straight cup
Material: Inner 304, outer 201