A well-packed carry-on can be undone by one thing: a toiletry bag that leaks, tears, or simply doesn't fit. The travel editors at Condé Nast Traveler have spent years testing dozens of wash bags and makeup cases on real trips, and their conclusion is simple — most of them fail. Some fall apart within months. Others have compartments so awkwardly sized that nothing fits where it should. Plenty are too bulky for a standard carry-on, while the skimpy ones can't even hold the basics.

The handful that made their final recommendations share a few telltale traits. Durability comes first: bags that survive being shoved into overhead bins and unpacked hotel-room after hotel-room. Wipe-clean linings are non-negotiable — a spilled serum or exploded sunscreen should be a two-second fix, not a ruined bag. And smart pockets matter more than raw size. The best designs separate skincare from makeup from toothbrushes, so a minimalist's sleek pouch and a ten-step-routine devotee's multi-compartment case can both earn top marks. Looks count too: the editors point out that the winners are genuinely chic, not just functional.

The real lesson from all that testing is to buy for your actual routine. If your travel beauty kit is lipstick, sunscreen and a contact-lens case, an over-engineered hanging organiser is dead weight. If you travel with serums, masks and tools, a flat pouch will leave you digging around at 6am. Measure against your carry-on too — a great bag that forces a checked bag is a bad trade.

Who is this for? Anyone who has ever arrived at a hotel with shampoo all over their clothes, or spent five minutes excavating a zip-lock for their face cream. Before your next trip, take five minutes to audit what you actually pack, then choose a bag sized to that — not to an imaginary version of yourself.