The ornamental design for a foldable bathtubcaddytray, as shown and described.
FIG. 1 is a perspective view of a foldable bathtub caddy tray showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is an exploded perspective view of the foldable bathtub caddy tray where a main body is in a folded state; and,
FIG. 10 is an enlarged view of portion 10 shown in FIG. 2.
The broken lines in the drawings depict portions of the foldable bathtub caddy tray that form no part of the claimed design. The long dash short dash lines in FIGS. 2 and 10 represent the bounds of the enlargement taken from FIG. 2 and form no part of the claimed design.