Appositives in the sentence

In a comment, BillJ wrote:

There is no appositive modifier in your example. Compare "We went to see the opera Carmen", where the noun "Carmen" is an appositive modifier of the noun "opera".

As Aml said in a comment, there is supposed to be a comma after "seal":

Each bottle had its own tight seal, cork and wire.

and the apposition/appositive is supposed to be "cork and wire". You can see the sentence given, with a comma and with "seal" circled and "cork and wine" underlined, in the following powerpoint: https://www.wtps.org/cms/lib/NJ01912980/Centricity/Domain/1135/nouns%207th%20grade.pptx