Mark the center of each of the short sides of the large white foam core board.

Measure and mark 15" out from the center line on one of the short sides. This will be the top of the "cup".

Measure and mark 8" out from the center line on the other short side. This will be the bottom of the "cup".

Draw a line from the top marks to the bottom marks to form the tapered cup shape.

Lay the foam core board onto a cutting mat.

Using a craft knife or utility knife, cut along the lines to cut out the cup shape. 

Cut the white fabric into two 1.5 yard pieces.

Lay the "cup" on both pieces of fabric. Cut out the fabric about 3" from the edge of the "cup".

Set aside one piece of fabric.

On the second piece of fabric, fold the edges over about 3"and press flat with an iron. Set aside.

Glue batting to cover the "cup" shape.

Lay this batting side down on the white fabric (not pressed).

Run a bead of Aleene's Quick Dry Fabric Fusion along the edge of the "cup". Fold the fabric and batting over, pressing into the glue. Secure with clothespins while drying.

Spray the front of the "cup" with Tulip ColorShot in unicorn drink colors. 

Dip a paintbrush into Tulip Slick Dimensional Paint in white. Hit the brush against your hand, in a downward motion to create splatters on the "cup" front. Allow to dry.

Cut a circle from the small foam core board.

Cut batting and green cotton fabric a few inches larger than the foam core circle.

Apply a bead of Aleene's Quick Dry Fabric Fusion to the edge of the circle and press the fabric and batting to it. Allow to dry.

Cut a piece of green fabric to fit the tube.

Apply Quick Dry Fabric Fusion to both long edges and roll around the tube. 

Tuck the ends of the fabric into the ends of the tube to form a straw.

Glue the straw to the hat with Aleene's Quick Dry Fabric Fusion. Wrap the hat brim slightly around the end of the tube and hold in place with a rubberband until completely dry.