Concert merchandise is the one category where people queue to pay for the branded item. That changes the brief completely: the design has to be good enough to wear without the logo excuse, and the operation has to survive a twenty-minute intermission.

Credentials are branding you already print

Lanyards, badge holders and wristbands have to exist anyway for access control, so the incremental cost of putting a sponsor or venue mark on them is close to nothing. Laminated passes are the item attendees are most likely to keep as a souvenir, which is worth more than most giveaway tables.

Print the tour, not the logo

The tees that sell are the ones with artwork and a date list; the ones that do not sell are corporate logos on blanks. If a sponsor is involved, a small back-neck or sleeve mark is the placement that survives — it keeps the shirt wearable and keeps the brand on it for years.

Light-up items work because the room is dark

LED wristbands, glow sticks and light-up badges are the rare promotional item that improves the event itself, and they photograph in a way nothing else on this list does. They are also consumable, so order to attendance rather than to a keepsake ratio, and confirm the venue permits them before you commit.