A container includes an outer shell and an inner liner. The inner liner and the outer shell are made of different metal materials. A top end of the outer shell is fixedly connected to a top end of the inner liner. The container further includes a metal composite ring for connecting the outer shell and the inner liner. The metal composite ring includes an inner metal ring and an outer metal ring. The inner metal ring includes an annular first welding portion and an annular first connecting portion. The outer metal ring includes an annular second welding portion and an annular second connecting portion. The first connecting portion and the second connecting portion are located between the first welding portion and the second welding portion and connected in a sleeved manner.