Dual Layer Coaster

FIG. 1 is a perspective view of an ornamental design for a dual layer coaster comprising a round upper layer and a square lower layer;

FIG. 2 is a top view of the dual layer coaster of FIG. 1 ;

FIG. 3 is a bottom view of the dual layer coaster of FIGS. 1 - 2 ;

FIG. 4 is a front side view of the dual layer coaster of FIGS. 1 - 3 ;

FIG. 5 is a rear side view of the dual layer coaster of FIGS. 1 - 4 ;

FIG. 6 is a left side view of the dual layer coaster of FIGS. 1 - 5 ;

FIG. 7 is a right side view of the dual layer coaster of FIGS. 1 - 6 ;

FIG. 8 is a perspective view of an alternative embodiment of the dual layer coaster of FIGS. 1 - 7 ;

FIG. 9 is a bottom view of the alternative embodiment of the dual layer coaster of FIG. 8 ;

FIG. 10 is a perspective view of an ornamental design for a dual layer coaster comprising a round upper layer and a rectangular lower layer;

FIG. 11 is a top view of the dual layer coaster of FIG. 11 ;

FIG. 12 is a bottom view of the dual layer coaster of FIGS. 10 - 11 ;

FIG. 13 is a front side view of the dual layer coaster of FIGS. 10 - 12 ;

FIG. 14 is a rear side view of the dual layer coaster of FIGS. 10 - 13 ;

FIG. 15 is a left side view of the dual layer coaster of FIGS. 10 - 14 ;

FIG. 16 is a right side view of the dual layer coaster of FIGS. 10 - 15 ;

FIG. 17 is a perspective view of an alternative embodiment of the dual layer coaster of FIGS. 10 - 16 ;

FIG. 18 is a bottom view of the alternative embodiment of the dual layer coaster of FIG. 17 ;

FIG. 19 is a perspective view of an ornamental design for a dual layer coaster comprising a square upper layer and a rectangular lower layer;

FIG. 20 is a top view of the dual layer coaster of FIG. 19 ;

FIG. 21 is a bottom view of the dual layer coaster of FIGS. 19 - 20 ;

FIG. 22 is a front side view of the dual layer coaster of FIGS. 19 - 21 ;

FIG. 23 is a rear side view of the dual layer coaster of FIGS. 19 - 22 ;

FIG. 24 is a left side view of the dual layer coaster of FIGS. 19 - 23 ;

FIG. 25 is a right side view of the dual layer coaster of FIGS. 19 - 24 ;

FIG. 26 is a perspective view of an alternative embodiment of the dual layer coaster of FIGS. 19 - 25 ;

FIG. 27 is a bottom view of the alternative embodiment of the dual layer coaster of FIG. 26 ;

FIG. 28 is a perspective view of an ornamental design for a dual layer coaster comprising a round upper layer and a hexagonal lower layer;

FIG. 29 is a top view of the dual layer coaster of FIG. 28 ;

FIG. 30 is a bottom view of the dual layer coaster of FIGS. 28 - 29 ;

FIG. 31 is a front side view of the dual layer coaster of FIGS. 28 - 30 ;

FIG. 32 is a rear side view of the dual layer coaster of FIGS. 28 - 31 ;

FIG. 33 is a left side view of the dual layer coaster of FIGS. 28 - 32 ;

FIG. 34 is a right side view of the dual layer coaster of FIGS. 28 - 33 ;

FIG. 35 is a perspective view of an alternative embodiment of the dual layer coaster of FIGS. 28 - 34 ;

FIG. 36 is a bottom view of the alternative embodiment of the dual layer coaster of FIG. 35 ;

FIG. 37 is a perspective view of an ornamental design for a dual layer coaster comprising a round upper layer and a triangular lower layer;

FIG. 38 is a top view of the dual layer coaster of FIG. 37 ;

FIG. 39 is a bottom view of the dual layer coaster of FIGS. 37 - 38 ;

FIG. 40 is a front side view of the dual layer coaster of FIGS. 37 - 39 ;

FIG. 41 is a rear side view of the dual layer coaster of FIGS. 37 - 40 ;

FIG. 42 is a right side view of the dual layer coaster of FIGS. 37 - 41 ;

FIG. 43 is a left side view of the dual layer coaster of FIGS. 37 - 42 ;

FIG. 44 is a perspective view of an alternative embodiment of the dual layer coaster of FIGS. 37 - 43 ;

FIG. 45 is a bottom view of the alternative embodiment of the dual layer coaster of FIG. 44 ;

FIG. 46 is a perspective view of an ornamental design for a dual layer coaster comprising a square upper layer oriented at a ninety degree angle relative to an orientation of a square lower layer;

FIG. 47 is a top view of the dual layer coaster of FIG. 46 ;

FIG. 48 is a bottom view of the dual layer coaster of FIGS. 46 - 47 ;

FIG. 49 is a front side view of the dual layer coaster of FIGS. 46 - 48 ;

FIG. 50 is a rear side view of the dual layer coaster of FIGS. 46 - 49 ;

FIG. 51 is a right side view of the dual layer coaster of FIGS. 46 - 50 ;

FIG. 52 is a left side view of the dual layer coaster of FIGS. 46 - 51 ;

FIG. 53 is a perspective view of an alternative embodiment of the dual layer coaster of FIGS. 46 - 52 ; and,

FIG. 54 is a bottom view of the alternative embodiment of the dual layer coaster of FIG.

The broken lines form no part of the claimed design.