One problem with pocket-sized multi-tools is that they're often too small to be very useful. They're hard to hold and some of the tools are just impractical.
That's not so with the Tactica M100 multi-tool. It's the perfect size to grip in your palm and comes with only some of the more practical tools you might need, like a bottle opener, 1/4" hex bit drive (two, actually), 3/16" to 9/16" (5mm to 14mm) hex drives, and a package opener. It also comes with a small storage container for your hex bits and a ruler, which doesn't seem all that practical to use.
The Tactica M100 is still small and lightweight enough to throw in a pocket. It's TSA-friendly. And for today only, it's on Amazon for $29.95 ($10 off).