For travel, especially, these are the best I've found: Note the button release on the lower edge? No more accidental pill spills. It's also easier to open one compartment at a time.
A hidden feature that I liked a lot: the bottom of the compartments have a smooth curve up to the edge, instead of square corners, so it's easy for those of us with oversize fingers to get those slightly clingy capsules out of there. No corner for them to get caught in.
They're available in several colors, so I use grey for "evening" pills, green for "morning" pills. Your associations may vary, especially if you're a night owl (I'm a lark, myself.)