Originally Posted by
polkacat
Bumped into this issue 3 or 4 years ago. My saline was 3.4 oz, which TSA never bothered about, but it was confiscated at Heathrow. First and only time I'd had a problem; now I'm very careful about my saline container size when going through LHR.
3.4oz is exactly 100.55ml so unless LHR is that strict, it should be able to pass.