Most packing gear is optional. A few pieces, though, pay for themselves on the first trip: a carry-on that actually fits the overhead bin, cubes that keep a bag organized, bottles that pass the liquids check, a scale that stops an overweight-bag fee, and a tracker that tells you where your checked bag ended up.
Below is each one in turn — what it does, what to look for, and when you can skip it. Jump straight to the piece you care about:
🧳 Carry-on luggage
The right carry-on pays for itself the first time you walk past the checked-bag counter. But "carry-on size" isn't one number — it varies by airline, and a bag that's legal on one carrier gets gate-checked on another.
Size: match the sizer, not the marketing
Airlines publish a maximum carry-on dimension (roughly around 22 x 14 x 9 inches / 56 x 36 x 23 cm on many carriers, but it varies — always check your airline). Two things trip people up:
- Wheels and handles count. The listed dimensions include them, so a bag advertised as "22 inch" can still be over once you measure the whole thing.
- Budget airlines are stricter. Low-cost carriers often have smaller allowances or charge for anything bigger than a personal item — check before you fly, not at the gate.
If you fly budget airlines a lot, size down to their limit. If you mostly fly full-service carriers, a standard domestic-legal carry-on is usually fine.
Hard shell vs soft side
| Type | Best for |
|---|---|
| Hard shell | Protection and water resistance, clean look; clamshell packs flat. Can crack if abused and offers no external pockets. |
| Soft side | External pockets, a bit of "give" to squeeze into sizers, often lighter. Less protection for fragile items. |
For most travelers a hard shell is the easy default; if you want a laptop pocket you can reach at security, soft side wins.
Wheels, weight and the details that matter
- 4 wheels (spinner) roll upright and are easy in airports; 2 wheels handle rough pavement better and give a bit more packing space.
- Empty weight matters — every pound of bag is a pound you can't pack. Lighter is better, especially on airlines with a carry-on weight limit.
- Handle and zippers are what break first. A sturdy telescoping handle and solid zippers are worth more than fancy extras.
- Warranty — luggage takes a beating; a good warranty tells you the maker expects it to last.
🗂️ Packing cubes
For most travelers, yes — packing cubes are worth it, but not for the reason people usually expect. They won't magically double the room in your bag. What they do is turn a chaotic pile of clothes into tidy, findable blocks, so you can live out of a suitcase without unpacking it, and repack in two minutes.
What packing cubes actually do
A packing cube is a lightweight zippered fabric pouch that holds a category of clothing — shirts in one, underwear and socks in another, and so on. The real benefits are organization and control:
- Everything has a place. You can find a clean shirt without excavating the whole bag, and dirty laundry gets its own cube instead of mixing in.
- Faster packing and repacking. Cubes lift out and drop back in as units, which is a real time-saver on multi-stop trips.
- A tidier bag. Contents stay put when the bag is upended, tilted, or squeezed into an overhead bin.
- Easier security and hotel life. Cubes double as drawer organizers, so you can leave clothes in them at the hotel.
Do they actually save space?
This is where expectations need adjusting. Standard (non-compression) cubes mostly reorganize the space you already have — a well-packed bag without cubes and a well-packed bag with cubes end up similar in volume. Where you gain room is with compression cubes, which have a second zipper that squeezes air (and some loft) out of soft, bulky items.
| Style | What it's best at |
|---|---|
| Slim / standard cubes | Organization and structure. Lightest option; great for clothes that shouldn't be crushed. Minimal space gain on their own. |
| Compression cubes | Shrinking bulky, soft items (T-shirts, base layers, light jackets). Best real space savings — at the cost of more wrinkles and a bit more weight. |
Rule of thumb: compression helps most with bulky-but-soft clothing and light layers; it does little for already-thin items or anything you don't want creased.
Sizes, sets and material quality
Most people are best served by a small set of mixed sizes rather than one big cube. A typical combination is a large cube for tops, a medium for bottoms, and a small for underwear and socks — plus one spare for laundry.
- Match cube size to your bag. Buy cubes that fit your carry-on's interior; oversized cubes waste corners and won't lie flat.
- Fabric: ripstop nylon or polyester is light and durable. Very thin mesh saves weight and lets you see contents but tears more easily.
- Zippers are the weak point. Look for smooth, sturdy zippers with reinforced ends and grab-friendly pulls — that's usually what fails first.
- Mesh vs solid tops: mesh breathes and shows contents; solid fabric hides them and adds a little structure. Either works.
🧴 TSA toiletry bottles
Carry-on-only travel lives or dies at the liquids bin. Buy the wrong toiletry bottles and you're either surrendering your shampoo at security or scrubbing leaked conditioner out of your bag. The fix is a set of small, refillable, leak-proof travel-size bottles that fit the 3-1-1 rule — the right travel containers for a flight mean nothing gets pulled at screening.
The 3-1-1 rule
In the US, carry-on liquids follow what the TSA calls the 3-1-1 rule. It's easy to remember once you break it apart:
- 3.4 — each container must be 3.4 oz / 100 ml or less (it's the container size that matters, not how full it is).
- 1 — all your containers go in one quart-size (roughly 1 liter) clear, resealable bag.
- 1 — one bag per passenger.
Rules vary and change. Other countries and airports have their own limits and screening tech, and requirements are updated from time to time — always check the TSA and your departure airport before you fly. For the full breakdown, see our TSA liquids guide.
Why silicone bottles win
The travel-size bottles from a drugstore are cheap, but they're stiff, hard to squeeze empty, and prone to popping open. Purpose-made silicone travel bottles (the squeezable GoToob-style kind) solve most of that.
- Leak-proof by design — good ones use a valve or sealing disc so pressure changes at altitude don't force product out.
- Squeezable — soft silicone lets you push product out and get the last bit, instead of shaking a rigid bottle.
- Refillable and durable — wide openings make them easy to fill and clean, and they survive many trips.
- Under the limit — sold in sizes at or below 3.4 oz / 100 ml so they're compliant out of the box.
| Silicone travel bottles | Drugstore travel bottles | |
|---|---|---|
| Leak resistance | High — valve/seal designs | Variable; can pop open |
| Ease of use | Squeezable, easy to empty | Rigid, harder to squeeze |
| Refill & clean | Wide openings, reusable | Narrow, often single-trip |
| Longevity | Many trips | Short-lived |
Refilling and labeling
A refillable set only helps if you can tell the shampoo from the conditioner at 6 a.m. in a dim hotel bathroom.
- Don't overfill. Leave a little headroom so the bottle can be squeezed shut and so air can expand without pushing product out.
- Label clearly. Use the included tags, a write-on panel, or waterproof labels — color-coding caps is a fast shortcut.
- Fill over a sink and wipe the threads before closing so the cap seals cleanly.
- Bag them anyway. Even leak-proof bottles go inside your quart bag — that's both the rule and cheap insurance.
- Wash between trips to avoid buildup, especially with thicker products.
⚖️ Luggage scale
Nothing kills a smooth check-in like the agent pointing at the display: your bag is over the limit. Overweight fees are steep, they're charged at the counter with a line behind you, and your only options are paying up or repacking on the floor. A pocket-sized luggage scale lets you catch the problem at home, where fixing it is free.
Why weigh at home
Airlines set a weight limit per checked bag, and going over it triggers an overweight fee that's often more than the scale itself costs — sometimes a lot more, and charged on the spot. Weighing at home turns a surprise at the counter into a two-minute check in your bedroom.
- Fees are steep and non-negotiable. Once you're at the counter, you pay or you repack in front of everyone.
- Limits vary by airline, route and fare. A common checked-bag limit is around 50 lb / 23 kg, but it varies — always check your airline and ticket.
- The bathroom-scale trick is imprecise. Weighing yourself then yourself-plus-bag works in a pinch, but it's easy to be off by several pounds right where it matters.
How a portable luggage scale works
A digital hanging scale is a small handle with a hook or strap and a display. You attach it to your bag's handle, lift the bag clear of the floor, and it shows the weight.
- Hook or strap loops through your bag's grab handle.
- Lift and hold until the reading settles and locks (most beep or freeze the number).
- Battery powered — usually a coin cell or AAAs; check it before a trip so it's not dead when you need it.
- Switches units between pounds and kilograms — handy since limits abroad are usually in kg.
Weighing accurately
A luggage scale is only useful if you trust the number. A few habits keep it honest:
- Lift the bag fully off the ground and hold still — a bag resting or swinging gives a false low reading.
- Stand on a firm floor, not carpet or a soft surface, and keep the bag from touching anything.
- Wait for the lock. Read the number only after it settles; don't trust the first flicker.
- Leave a buffer. Aim a couple of pounds under the limit — your scale and the airline's scale won't match to the ounce.
- Sanity-check it with a known weight now and then to make sure it hasn't drifted.
| When to weigh | Why it matters |
|---|---|
| Before you leave home | Catch an overweight bag while fixing it is free — move items to a carry-on or shift the load. |
| Before the return flight | Souvenirs, gifts and duty-free add up fast. The bag that was fine on the way out is often over on the way back. |
| When splitting between bags | Balance weight across bags so no single one goes over, even if the total is fine. |
Right at the weight limit? Move your heaviest items into the cabin. See how to choose carry-on luggage and what belongs where in carry-on vs checked, and build a lean load with our packing list.
📍 Luggage tracker
Airlines don't lose most bags, but when yours is the one that doesn't come out on the belt, being able to see roughly where it is changes everything. A coin-sized Bluetooth tracker tucked into a checked bag lets you check its last known location from your phone — so you can tell an agent "it's still at my connection airport" instead of shrugging.
Why put a tracker in a checked bag
The value shows up in exactly one situation: your bag and you get separated. Instead of relying only on the airline's system, you have your own read on where the bag is.
- Peace of mind at connections. You can see whether your bag made the same transfer you did.
- Better conversations with the airline. Telling an agent the bag's last known airport helps them locate it.
- Faster reunions. If a delayed bag starts moving toward you, you'll often see it before anyone calls.
It won't stop a bag from being misrouted — but it turns "somewhere in the system" into "last seen at Terminal 2."
How they work: crowd-finding, not GPS
This is the part people most often get wrong. Most consumer trackers (AirTag-style tags and similar) are Bluetooth devices, not GPS units. They don't know their own location. Instead they broadcast a secure signal that's picked up by the huge network of other people's phones passing nearby, which anonymously report the location back to you.
| What it is | What it isn't |
|---|---|
| A Bluetooth tag found by a crowd-sourced network of nearby phones. | A live GPS dot that updates continuously on its own. |
| Location updates whenever a network phone passes near the bag. | Real-time tracking in empty areas with no phones around. |
| Great in busy airports full of phones. | Reliable in a remote warehouse with no one nearby. |
In an airport this works well because it's crowded. In an empty cargo area you may just see the last place a phone detected it — which is still useful.
iPhone vs Android, and battery
Which tracker to buy depends on your phone, because each ecosystem has its own finding network. A tag leans on one network to be found.
- iPhone users typically choose tags that work with Apple's Find My network.
- Android users typically choose tags that work with Google's Find My Device network.
- Some tags support both or offer their own app — check the product's stated compatibility with your phone before buying.
- Battery — many tags use a small replaceable coin-cell that lasts around a year, while others are rechargeable. Exact battery life varies by model, so check the spec and the official app requirements.