Scoop out 2 cups of seedless watermelon into a blender. You can use the measuring indications on the blender.
Add 1 cup of coconut milk to the blender with the watermelon.
Purée the watermelon and the coconut milk together in the blender. The consistency should be liquidy like juice.
Pour the liquid into silicone or original plastic ice cube trays. I chose to use silicone trays, because there are so many cute shapes.
Place the ice cube trays into the freezer. Be sure to put the silicone trays on a small cookie sheet before placing in the freezer.
Wait for the treats to completely freeze about two hours.
Pop them out of the ice cube trays, and share one with your eagerly waiting doggy.
Put the remaining in a freezer baggie or a small Tupperware container, and place back in the freezer.
These treats can be stored in the freezer for up to 30 days.