Polycarbonate water bottles don't contain any dangerous amount of BPA. It's a marketing ploy by 3m Eastman to force people to use lower life cycle plastics. Tritan cracks at 2 years old, and polycarbonate lasts at least 20 years. They know polycarbonate is safe because we haven't stopped using it in high impact kitchen appliances like food processors and blenders. They created a shittier plastic that hurts the environment to make more money.
Cheap canned goods are literally lined with BPA. Polycarbonate bottles have f**k all to do with humans BPA exposure. If you own a polycarbonate water bottle keep using it, it has no BPA on it after the first time you wash it.
Source: MS mechanical engineering focused in polymers. One of my profs posted a few papers on this.
Those new LED headlights should be banned. They might make the owner safer but not other drivers as they drive into f**king ditches because they were blinded by Klieg lights masquerading as car lights.
If you (person A) pull open a door and someone (person B) is wanting to come through from the other side, HOLD THE DOOR AND LET THEM THROUGH. Similarly, if you are the other person, don't dilly-dally, WALK THROUGH. Because the alternative is person A awkwardly trying to pass through whilst struggling to maintain holding the door open, leaving person B waiting awkwardly for them to finish.
Happens a lot at my office in the corridors and it does my head in.