"I like being able to close a bottle and put it back in my bag while on the go or just to reduce the possibility of a spill while at my desk or home. I imagine other people have similar concerns about going can-only."

"I just returned from Europe a couple days ago and here are my thoughts on these caps. The first bottle of water I bought, I'll admit I ripped the whole cap off, thinking it was just a manufacturing error, but I quickly realized my mistake. In practice, I like the idea, but it's obviously a design exercise that's still in its infancy. What we're seeing now are mostly stop-gaps, and they'll likely only improve with time. There were several different designs I encountered, but nearly all of them suffered from the same ergonomic issues. You had a weird opening motion of twisting and then having to lift the cap off and away from the mouth of the bottle, and then the reverse motion of closing the bottle was even more annoying. Some caps flipped out of the way reasonably well, others seemed to refuse to lock back and were constantly in the way leading to another issue. That issue is that about 50% of the time that you opened them, you would need to reposition the bottle in your hand to not have the cap interfere with your sip. I say "nearly" all, because I encountered one cap that seemed to be an improvement on the cap as opposed to a traditional twist cap but worse as many of these were. This cap was on a water bottle, apologies for not remembering the brand, but it was exclusively a flip cap. There was no multi-stage motion to open it, just press your thumb against the lever on the cap and push. It could be opened, used, and closed with a single hand and flipped down to lock against the bottle allowing me to drink from any angle without worrying about hitting my nose, cheek, or bearded chin against it. My only concern with this design would be how it would fare compared to a traditional twist cap if it were dropped. I'd gladly introduce the last cap I mentioned to other markets, but everything else needs some more time in the oven."

"Shockingly an exoskeleton is cheaper than most of their orbital sanders."