And in the US, 3 oz or less. And it better be less if you don't want TSA stopping you. I've been stopped a number of times at TSA for 3 oz bottles of mouthwash

And in the US, 3 oz or less. And it better be less if you don't want TSA stopping you. I've been stopped a number of times at TSA for 3 oz bottles of mouthwash or lotion. They don't make be throw it away, but it is an inconvenience having them paw through my bag.