A Calabash - or fresh helmet.
From the BBC.
Motorcyclists in Nigeria have been wearing dried pumpkin shells on their heads to dodge new laws forcing them to wear helmets, authorities have said.
Officials in the northern city of Kano said they had stopped several people with "improvised helmets", following this month's introduction of the law.
Motorcycle taxis are a cheap way for Nigerians to get around congested and chaotic city streets. Many drivers of the motorcycle taxis are furious over the new law, which came into force on New Year's Day.
In the city of Kaduna, drivers waved palm fronds and rode in convoy to protest at the price of helmets, which can cost up to $29 (£20). They say passengers often steal the helmets once they reach their destination.
Stories have also appeared in the local papers highlighting passengers' fears that the helmets could be used by motorcyclists to cast spells on their clients, making it easy for them to be robbed.
"Some people can put juju inside the helmets and when they are worn the victim can either lose consciousness or be struck dumb," passenger Kolawole Aremu told the Daily Trust newspaper.
Local government authorities often give motorbikes to jobless young men, saying it gives them a way to make a living.