Scrape out the spackle into a plastic bowl/container and add about 2 teaspoons of pink paint. Mix well.
Add to the pastry bag and set aside.
Paint the inside of a shot cup with pink paint. Let dry for a few minutes. May need a double coat if you feel like it isn't opaque enough.
Paint the inside of a shot cup with brown paint if you want to make it as well. The made topping will be enough for both cups. Let dry for a few minutes.
Ball up a small piece of paper towel and place it into the cup.
Paint around any areas that may have wiped off from placing in the paper towel. We liked the look of a little white behind the paint as it made the milkshake look a little creamy.
Set both aside for 10 minutes or so.
If you do not have a tip for the pastry bag or have found it hard to push the spackle out with a tip, then cut a notch into the end of the bag in a “V” shape.
Hold the cup firmly with one hand, and with the other hand, squeeze the spackle out beginning around the rim and then inward in a swirling motion.
Spray a little spray glue to the top and gently press in a bead.
Cut straws about 1 ½ inch and press into the icing at an angle.
Using the smallest size heart sticker, press onto the front of the “chocolate” cup.
Cut another heart sticker of the same size into “sprinkles”. Spray a little glue spray and attach the sprinkles gently to the spackle.
On the “strawberry” cup, press a line of gemstone stickers to the top and bottom of the cup.
Spray a little spray glue to the spackle and gently press pearls.
Set aside to dry 1-2 days.
Notes
When attaching the sticker and pearl “sprinkles” if you find it too hard to use your fingers, use craft tweezers.
Use ventilation when using the spray glue.
If you would like more weight to the cup, add a few marbles or small stones at the bottom of the shot cup before you put the paper towel down.