Portable inflatable pool systems and methods

A fluid container, comprising:

• a base comprising a bottom portion defined by a base of a bottom of a predetermined volume, a side portion defined by a side of the predetermined volume, an inner wall defined by an inner side of the predetermined volume, an outer wall defined by an outer side of the predetermined volume;
• a first air chamber joined to the base and disposed between the inner wall and the outer wall;
• and
• a second air chamber at least partially above the first air chamber, wherein the second air chamber is joined to the first air chamber, and wherein the second air chamber is disposed between the inner wall and the outer wall.

A method of filling a fluid container, comprising:

• deploying a base at least partially within a predetermined volume of a vehicle, wherein the base comprises a base portion and a side wall, wherein the base portion is joined to the side wall, wherein the side wall comprises at least one air chamber, and wherein the side wall includes an indicia configured to indicate a fluid level;
• inflating the at least one air chamber;
• filling a fluid into a volume defined by the base portion and the side wall;
• indicating via the indicia if a threshold weight capacity of the vehicle is reached or exceeded.