The Rush Black Fire Poppers 25ml is based on the original pentyl nitrite. The square 25ml bottle guarantees that this Rush still contains the popular old Rush formula. Wake up the fire in you with this original popper and when the time comes, the motto of this popper is “Fire the Shot”. The Rush Black Fire 25ml also has a small bead in the bottle. This means that the popper stays fresh longer after opening. The bead absorbs water molecules and oxygen molecules and binds them. Poppers prefer dry air to humid ambient air. So a disintegrated popper is not bad, it shows that it has served its purpose.