tldr: Check your sunscreen, avoid oxybenzone! All these chemicals are probably harmful. They enter your bloodstream and linger for weeks, but oxybenzone is currently regarded as the worst. In addition to irritating the eyes and skin of many people, oxybenzone is also a hormone disruptor.
I squeezed some cream from an old bottle of Coppertone 50, rubbed it in real good, and had no issues today. Walmart allowed me to return the Coppertone 70. I explained my reasons but that was unnecessary. The customer service rep made the return without saying a single word. I used to assume these awkward encounters were caused by me being an overly talkative weirdo but I now think it may be because of my sunburn.
They did have Blue Lizard and it's reasonably priced for a mineral sunscreen but, for now, I decided to stick with the chemicals that my skin is familiar with. Seeing a new bottle design on the Coppertone Sport 50 gave me pause and I don't like that they have no safety seal or packaging. Are they going to put that nearly full bottle of Coppertone 70 back on the shelf? Oh, well. If I have problems with this new bottle, I'll chat with the customer service guy, again.
Stay safe, folks. Hydrate and rub the lotion.