Available at Chatswood Interchange NSW. Found the following free rewards in the Chatswood Interchange Rewards App. You will need to download and register through the app.
1) Free Original glazed doughnut @ Krispy Kreme - Expires 31 May
2) Free Cookie @ Mrs Fields - Expires 31 July
3) Free Baked Cheese Tart @ Hokkaido Baked Cheese Tart x PAFU - Expires 31 July
4) Free spring roll/dim sum @ Saigon Rolls - Expires 31 July
5) Free Coffee @ The Steam Engine - Expires 31 July
Sounds like a meal sorted if you redeem all at once. There are other rewards too, but they require purchases.