A Realistic Toiletries Kit for Carry-On Only

Carry-on liquid restrictions (generally 100ml/3.4oz per container in most countries, all fitting in one clear quart-size bag) shape toiletries packing more than anything else, and the easiest fix is simply avoiding liquids where a solid or bar alternative exists.

Solid shampoo and conditioner bars have genuinely improved in recent years and sidestep the liquid limit entirely, along with solid deodorant, a solid or balm-style moisturizer, and even solid perfume if that's part of your routine. These also tend to last longer than their liquid equivalents and never risk leaking in your bag.

For anything that has to be liquid or gel, sunscreen, specific skincare, contact lens solution, decant into reusable travel-size containers (under 100ml) rather than buying full-size duplicates, cheaper, lighter, and compliant without a second thought.

Prescription medication is exempt from the standard liquid limit in most countries but should stay in its original labeled packaging, along with a copy of the prescription if it's a longer trip or a medication that might raise questions at security or customs.

A multi-use balm (several brands make one covering lips, cuticles, minor dry patches, and small cuts) earns its weight by replacing several single-purpose products.

Buy what you can locally rather than packing a full trip's supply. Most destinations have pharmacies or convenience stores stocking basics, and buying as you go, rather than over-packing “just in case,” keeps your kit small and avoids the common mistake of carrying three months of sunscreen for a three-week trip.

The overall goal: a toiletries bag you could fit in one hand, covering genuine needs without duplicating what you'll be able to buy there anyway.