I designed this on Tinkercad (you can modify) and printed in NinjaFlex. Not sure how it will work out in other filaments but if you try let me know.

I added the connector to keep the leaves and berries spaced properly when hanging. The leaves go in the outside holes and the 3 berries go through the same center hole. If you use a harder filament you could probably push into a small piece of Styrofoam for the spacers instead of using the connector.

Happy Holidays - hope you get lucky under the mistletoe!