In a blender,mix together the coconut milk, maple syrup, and vanilla extract. Pour the mixture into a Tupperware box and freeze it overnight. The next day, take half of the frozen mixture and add it to a food processor. Mix it on high until it resembles frozen yogurt and put it back into a storage container. Repeat this process with the other half of the mixture. Return the blended ice cream to the freeze for 30 minutes before serving.