Container and method of forming a container

An insulating container formed of a material comprising:

• an inner wall having a first end having an opening extending into an internal reservoir for receiving liquid;
• an outer wall forming an outer shell of the insulating container, the outer wall having first end configured to support the insulating container on a surface, a vertical wall section, a bottom portion, and a dimple, the dimple having a circular base and an inner portion converging to an opening, the opening being sealed by a resin;
• a sealed vacuum cavity forming an insulated double wall structure between the inner wall and the outer wall;
• and
• a cap covering the dimple and the opening and a weld connecting the cap to the outer wall,
• wherein the vertical wall section defines an inner surface for receiving the bottom portion and comprises a bottom-most surface, wherein the weld is formed between the cap and the bottom-most surface,
• wherein the inner wall comprises a first material having a first hardness value and the outer wall comprises a second material having a second hardness value, and
• wherein the first hardness value is different than the second hardness value, wherein the first material comprises a first density and the second material comprises a second density, and wherein the first density is lower than the second density, wherein the first material comprises an aluminum alloy or polymer and the second material comprises a titanium alloy.