Show and tour merchandise.
This is a pretty broad ticket, and someone may want to create additional 'complimentary' types later (e.g. T-shirt). However, I don't think any additional sub-types would nullify this one.

This event has a good example of where 'merchandise' + 'poster' can be used to define a poster as not being the tour poster, but a merch poster: https://beta.musicbrainz.org/event/6e44285a-60a7-4e52-a67b-f1318768f190/event-art
The example also contains shirt/clothing merchandise examples.