Good thing I thought to take these out of the device they were in, it was a night vision 'scope. Yet another warning not to leave Alkaline batteries in your remotes if you're not using them for an extended period of time!
These were brand new batteries that were stored with the 'scope a few years ago, I figured they'd at least get to their shelf date before leaking! Interesting that the bottom of each cell leaked more than the top... Yes, they're rotated, so the one with all the goo is a different battery each time.
Bottom like? Beware of Kirkland and Duracell for sure!