Add Foam Tape
Measure two pieces of industrial strength foam tape - these go in between the spaces of the groves.
Be sure to apply pressure to the tape so that it adheres well to the 3D printed strip. Use scissors to tape the foam tape to size.
Find a good spot in the fridge to add the strip, making sure there's enough clearance for different sized containers.
Use a damp paper towel with alcohol to clean the area and wipe away any condensation.
When dry, place the 3D printed strip into place and firmly press on it.