I don't do shop exclusively as part of my travel itinerary, how ever, some local taste sometimes good to bring back to your country. As you might having trouble find some cheap chips or art-craft, carrefour supplies all. not only some diaries, but also local food (such durian chips, jackfruit chips, tamarind sugar candy, etc.). there's also some art craft in some rows.
The Robinson in the other side of Jungceylon mall also provide some craft.
Big shopping center.
You can find almost everything here.
Note that it's more than one building...
What to buy: What you need.