The phrase "a bit of bottle" is correct and usable in written English.
It is typically used in British slang to refer to courage or bravery, often in the context of doing something challenging or risky.
Example: "It takes a bit of bottle to stand up and speak in front of a large audience."
Alternatives: "a bit of courage" or "a touch of bravery".
Mr Cameron rapped back: "If you have questions about our policy, find a bit of courage, discover a bit of bottle, get in your car, go to Buckingham Palace and call that election!" He was loving every single moment.
"It is obvious we are going to be lacking a bit of confidence, but you have got to at least show a bit of bottle and look as though you are enjoying your football.
They showed real elegant structure and the potential for great complexity with a bit of bottle age.
"The atmosphere is a lot more positive inside St James' Park now". Janmaat has "a bit of bottle" "Daryl Janmaat is one of the few players in the Newcastle side that has a bit of bottle, a bit of something about him.
"It's a bit more like it, a bit of of resilience, a bit of bottle and they threw a load of balls into our box and I thought the three defenders with three centre-backs were terrific in dealing with that.
One year in a village not far from Carnoustie, the man of the house was a whisky collector with a prosthetic eye who greeted me with a different bottle to taste each evening and once removed the eye for laughs when he had tasted quite a bit of the bottle.
"It wasn't unusual back then for the crowds to feel the squeeze on that staircase – there was always a bit of a bottle-neck at the bottom of it, and the crowds often had to stop.
At Slate, Laura Bennett almost apologized as she reluctantly pointed out that the Vimeo episodes "had lost a bit of the bottled intensity and laser precision of the first batch".
"He had a wee bit of bottle to take me back," said Derek Adams after the 3-1 win against Ayr United.
It's kind of the Holy Grail to get all three, which you can only get with a good bit of bottle aging.
The only problem is, it's a bit of a chunky bottle to fit in the fridge door.
