Place the water into a small bowl.

Sprinkle the gelatin over the water and set it aside to soften.

In a small saucepan, add the heavy cream, half & half, and sugar, bringing it ti a simmer over medium heat.

Turn the heat off and add the gelatin mixture.

Whisk the mixture for 2 to 3 minutes or until the gelatin melts.

Strain the mixture using a fine strainer.

add the vanilla extract to the strained mixture.

Divide the mixture between 4 containers.

Cover the containers with plastic wrap.

Refrigerate them for 4 to 6 hours or overnight.

After the Panna Cotta are cold, they are ready to serve.