commemorative       
adjective uk/kəˈmem.ər.ə.tɪv/ us/kəˈmem.ɚ.ə.t̬ɪv/
 纪念的,纪念性的
done or made to officially remember and give respect to a great person or event
  a commemorative statue/stamp/service/plaque 纪念雕像/邮票/服务/牌匾 
 Instead of tickets, they gave out commemorative coffee mugs. 他们赠送的不是门票,而是纪念咖啡杯。 
 See: commemoration
 - More examples
 - Everyone who takes part in the race will get a commemorative medal.
 - In 2009, he was honored with a commemorative stamp.
 - Presses are set to roll tonight for a special commemorative edition of the magazine.