This is very large, and the buttons to open work very well (and are kind of fun, frankly). Both sides are connected, but can be removed separately as well, which could be nice…. But the pm goes backwards. This makes sense when they are together, but could be confusing if used separately. My one huge complaint with this item is that the inside is not curved so that you can easily slide your pills out. They can kind of get held up in the corners, so if someone has any dexterity issues, this could See full review