Silicone Pastry Brush
A modern alternative to grandmother's goose feather brush for greasing pans. You can use it to grease baking pans, roasts/grills, sweet breads, etc.
It has two major advantages: it's very easy to clean and you can degrease it with detergent because it doesn't absorb chemicals, and it withstands high temperatures, so you can use it on hot surfaces without any problems.