Re: Thank heavens it's harmless ...
"Does UK have child-proof liquid nicotine containers yet?"
I've been at this over four years and never seen any container that wasn't child proof. Ever.
And as you're clearly no toxicologist, here's what you have to remember.
The Dose Makes The Poison.
As others have pointed out, water toxicity is a thing that will flat out fucking kill you (Leah Betts anyone? No, ecstasy didn't kill her, drinking too much water while using it did).
""29141 calls during that study period to poison control centers" [between 2012-2015 USA e-cigs]"
Calls to poison centres aren't poisonings - they're people worried about poisonings, which includes people who simply don't understand that you'd practically have to bathe in e-liquid for it to have any marked effect on you. Also, the numbers have dropped steadily since.
I could explain this point by point, but Clive Bates does a better job of it, including putting those numbers into context. They're fucking tiny compared to cosmetics, painkillers, and pretty much anything that's recorded.
Here's a good comparator: Laundry pods vs ecigs.
The difference being, laundry pods regularly kill. E-liquids? I've only heard of a couple of cases where they were suspected as being part of it (and no, nicotine base doesn't count as that's actually a rare, DIY only thing in the market - and even then, that's only one case, mixed with fuckton of vodka...) - the concentration of nicotine in e-liquids is so low that their danger is mild (vomiting occurs quickly, well before any chance of hitting the LD50 - which would take litres for anyone bigger than a child) and because almost all liquids are sold in child proof bottles, those young/small enough to be at risk rarely get exposed.
And yes, given that the number of vapers is in the tens of millions worldwide, a few thousand calls to poison centres and only handful of confirmed poisonings is rare.