Don't let my complaints minimize yours. I'm all for complaining, it's a good release.
I keep pliers handy, and monkey wrenches (although those have broke glass mason jars). My flavorings haven't been bad, they're all glass and none are childproof. The 10ml flavoring bottles are painful if I don't think to use a different finger.
There's always the method of handing it to someone else.
I've been wondering if it's getting grip back since surgery/nerves freed up that is tearing my knuckles up. I need to remember to ask my Drs about it.
My bought liquid bottles reused for DIY are childproof and a problem. I bought some bottles to rebottle bulk chitosan kieselsol for wine clearing and got quite a few spare caps that fit my 30ml, but cutting apart the worse offenders works until I remember to order some for all. The glass bottles I've bought for DIY haven't been childproof. Just ordered a bunch for nicotine and a few extra large ones for recipes I use a lot.
The offending bottle you showed, I'd probably rebottle all of those after that experience.