Patent ID: 11959301
Assignee: BELGRAVIA WOOD LIMITED
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 18:
19. A method of filling a fluid container, comprising:
deploying a base at least partially within a predetermined volume, 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 a sheet and at least one inflatable air chamber above the sheet, a second air chamber at least partially above the at least one inflatable 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; and
indicating via an indicia if a threshold fluid capacity is reached or exceeded;
wherein the side wall includes a recess to accommodate a portion of an interior surface of the predetermined volume.