In British slang the word bottle means courage or bravery. So if you have bottle you are brave and are willing to take risks and do dangerous things. Check out these example sentences:
"It takes a lot of bottle to be a racing car driver."
"Do you have the bottle to go skydiving?"
"Don't be scared. Don't lose your bottle."
"I didn't do the bungee jump. I bottled it at the last moment. Now my friends are calling me a bottler!"
