Famous Teochew Chai Kuih @ Taman Muda, Ampang
The chai kuih are made without preservatives but they tasted fine to me even after a day in the chiller. I reckon it is perfectly possible to buy in bulk and steam or fry them within a week. Since they are so greasy, you do not have to worry about them sticking to each other or drying out.
There is a perpetual queue at the shop and it is common to see orders of up to 10 – 30 boxes per customer. The kuih is small and easily snapped up in one bite so if you’re in queue, just buy a minimum of 10 to make it worth your while!