Purchase protection, but may get popped eventually! (6,4)

I believe the answer is:

bubble wrap

'purchase protection' is the definition.
(protective material wrapped around a purchase)

I don't understand how the remainder of the clue works.

(Other definitions for bubble wrap that I've seen before include "Plastic packaging material fun to pop!" , "Packing material (which can be popped!)" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app