non-returnable
adjective /ˌnɒn rɪˈtɜːnəbl/
  /ˌnɑːn rɪˈtɜːrnəbl/
- (also non-refundable)(of a sum of money) that cannot be returned
 - that you cannot give back, for example to a shop, to be used again; that will not be given back to you
- non-returnable bottles
 - a non-returnable deposit
 
 opposite returnable