Rotation and Location keyframes

I’m working on an animation where the humanoid (MH) is drinking from a bottle (see pic). The rotation has gone well. I’m trying to engage the location keyframes so the bottle stays in the mouth for a couple of seconds before retreating. The Location keyframes won’t move off of 0.000, and they are unlocked.
I can always just change the camera angle for the shot, but if possible I’d really like to know where the problem is.
I’m using YZX Euler. That was the default when I started. The bottle is attached to the hand with Dynamic Parent, so the arms are in FK (DP won’t work with IK).
Any thoughts on this would be appreciated.