FIG. 1 is a perspective view of the first embodiment of a canister according to my new ornamental design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is another perspective view thereof;
FIG. 8 is a perspective view of a second embodiment of the canister of FIG. 1;
FIG. 9 is a front elevational view thereof;
FIG. 10 is a rear elevational view thereof;
FIG. 11 is a top plan view thereof;
FIG. 12 is a bottom plan view thereof;
FIG. 13 is a left side elevational view thereof; and,
FIG. 14 is another perspective view thereof.
The broken lines in the drawings depict portions of the canister that form no part of the claimed design.