Step 5: Heat and Form the "Fingers"
Heat the end carefully over the stove to soften it. Keep it moving and at an adequate distance from the flame to keep the plastic from burning.
Bend the fingers into the hook shape by pressing them against something, such as a wall. You can always do touch-up heating with a propane torch to modify the shape.
Make sure the slot between the two fingers is open enough to accommodate the berry stem. If it is not, you may have to open it up more with a saw, or file.