Earlier this afternoon, the worst happened: I wasn't paying attention and closed the bottle cap all the way. We then spent the next hour trying to re-open the bottle before developing a technique that involved both hands and both legs, which yielded about a 40% success rate in testing.

When @feathers came home tonight, we employed a more permanent solution: using wire cutters to permanently remove the tabs keeping the lid closed. Why didn't we think of this earlier?