What is a puffer bottle?

A puffer bottle is a manually operated specifically-shaped container that is used to prepare static grass for application to a railway layout or other diorama. Static grass is a type of model grass that stands on end when sprinkled onto a layout, because of this it looks more realistic than traditional model grasses that lie flat when applied.

Puffer bottles work by applying a static charge to model grass fibres. They are operated manually by shaking the bottle when part filled with static grass. The same bottle can then be used as an applicator to sprinkle the grass on to an area prepared with glue.

Puffer bottles are considered to be entry-level tools, designed to allow modellers to experiment with static grass at little cost and often appear in 'static grass starter sets'. Modellers that decide to apply static-grass to a whole layout often progress to electrically operated chargers.