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B.Y.O. Social Media Challenge:

Period: From 29 Sep to 26 Oct 2025

How to Join ?

Bring along your reusable containers to purchase takeaway food or drinks on campus

Take a photo of your takeaway and the receipt of the takeaway respectively

  • The receipt date must be within the event period (29 Sep to 26 Oct 2025)

  • The food / drink in the takeaway photo must match the name shown on the receipt

Follow our social media (Facebook: HKU Sustainability / IG: @hku_sustainability)​

Share the takeaway photo on your social media (Facebook / IG) as a story, and...

  • Add a caption "B.Y.O. for a zero waste campus"

  • Tag our social media (Facebook / IG)

Click 

to upload the following photos (upload deadline: 28 Oct 2025 23:59)

  • A screenshot of the story

  • Receipt of your B.Y.O. takeaway on HKU campus

DONE ! You'll get a chance to win 150 GreenU points!

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Each participant can join the challenge 3 times

and earn a maximum of 450 GreenU points !

(*Each participant can only join the B.Y.O. Social Media Challenge ONCE per day.)

B.Y.O. Promotional Booths:

Booth 1:

Date: 8 Oct 2025 (Wed)  
Time: 11:00am - 2:00pm

Venue: G/F, Centennial Campus (Opposite to The Bank of East Asia)

Booth 2:

Date: 22 Oct 2025 (Wed)  
Time: 11:00am - 2:00pm

Venue: Haking Wong Podium

Content:

B.Y.O. Game

(Complete the game to win ONE HKD10 Drink Voucher!)

B.Y.O. Action

(Show your B.Y.O takeaway to win TWO HKD10 Drink Voucher!)

By participating in both of the above activities, you have a chance to win an extra 20 GreenU Points and up to HKD30 Drink Voucher  !

*The quantity of HKD10 drink vouchers is limited and available on a first-come, first-served basis. 

Terms and Conditions: 

  1. This event is for HKU students and staff only. 

  2. The B.Y.O. takeaway food/drink item must be purchased from restaurants on HKU campuses. 

  3. The takeaway photo should clearly show the B.Y.O. container and the purchased food/drink. 

  4. The receipt photo should clearly show the name of the purchased food/drink, the restaurant name, and the purchase date & time. 

  5. The food/drink item shown in the takeaway photo must match the food/drink name shown on the receipt. 

  6. The screenshot of Facebook/Instagram story should clearly show the caption "B.Y.O. for a zero waste campus" and the tagging of HKU Sustainability (Facebook) / hku_sustainability (Instagram). 

  7. The participant should follow the Facebook page (HKU Sustainability) and/or Instagram page (hku_sustainability) of Sustainability Unit. 

  8. If the submitted photos (screenshot of Facebook / Instagram story and the receipt) fulfill all requirements listed in clause 2-7 of " Terms and Conditions", the participant will be considered as completing the B.Y.O. mission and 150 GreenU Points will be awarded. 

  9. Each participant can only join the B.Y.O. Social Media Challenge ONCE per day. If multiple submissions from the same participant are received on the same day, only the first submission will be accepted.

  10. Each participant can repeatedly participate in this event to earn up to a maximum of 450 GreenU Points within the event period. Repeated submission of the same takeaway photo, receipt photo or screenshot of Facebook / Instagram story is not acceptable. 

  11. Winners of B.Y.O. Social Media Challenge will be notified by email separately. 

  12. Participants must ensure that they are the owners and hold the copyright of the uploaded photos. Once the photos are uploaded, participants agree and accept that the Sustainability Unit may edit, publish, display, exhibit and/or reproduce the photos in any form for promotional, educational and archival purposes, without notifying or paying the participants for any copyright fee or additional consideration. 

  13. Each participant can win a maximum of ONE HKD10 Drink Voucher in the B.Y.O. Game at each promotional booth.

  14. Each participant can win a maximum of TWO HKD10 Drink Vouchers in the B.Y.O. Action at each promotional booth.

  15. The quantity of HKD10 Drink Vouchers is limited and available on a first-come, first-served basis.

  16. In case of dispute, the decision of Sustainability Unit shall be final. 

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