i mean you can make your own plug with virtually anything(like modeling clay or even gum) but id pick up a roll of something similar to this and keep it around the house for random other uses

https://www.amazon.com/Washable-Adhesive-Reusable-Traceless-Household/dp/B07XQ2CHRJ/ref=pd\_lpo\_2?pd\_rd\_i=B07XQ2CHRJ&psc=1