If you want a small travel safe for situations where your valuables may be out of reach, the Master Lock Portable Small Lock Box is one of the more practical options PTG has covered. It is designed for flights, ferries, beach days, hostel-style settings, and other moments when leaving your phone, wallet, or passport loose in a bag feels unnecessary.
In this review, the main question is whether the lock box is compact enough to justify packing, and whether the cable-and-combination setup is actually useful in real travel situations instead of just sounding reassuring in theory.
It’s ideal to be trusting of strangers, but sometimes that trust results in hard lessons. It’s understandable that we may want to sleep on overnight flights, ferry voyages, and train rides—but when we do, do we continue to keep our valuables in plain sight or easily accessible bags? What if we decide to take a walk or visit the restroom?
It might seem excessive to lock our valuables up, but it’s much easier when you have a small lock box that doesn’t take up much room. The Master Lock Portable Small Lock Box is the size of a large book (9.8” x 5.5” x 2.6”), and can be stored in your under-seat bag. The hard-sided travel safe has a shock-absorbing foam that lines the interior, and can fit your phone, earbuds, keys, passport, cards, and cash.
The lock box has a four-digit combination lock that you can set with a code that you’ll remember, and it comes with a cable that you can secure to a fixed object—like the leg of an airline seat. There’s a small port to thread a charging cable through, if you want to keep your device charging while locked inside.
I’ve taken my lock box along with me to the beach, so that when I’m in the water, my phone and keys are locked inside and secured to a fencepost or tree. The box is designed to be water-resistant, but not waterproof, so don’t bring it into the water with you.
If you’re sending a child off to college, this would be a smart buy for keeping valuables secured in a dorm room.
The Master Lock Portable Small Lock Box lists for $17.97 on Amazon and comes in two colorways: gunmetal gray and pink.
When A Small Travel Lock Box Makes Sense
A compact lock box is most useful when you need a simple layer of deterrence rather than a heavy-duty safe. For more practical add-ons in the same cluster, browse the travel accessories archive and PTG’s wider coverage of organizers, bags, and carry-on essentials.