Shelf life and preservation of Bánh chưng

It's Tết again and I'm about to buy this traditional Vietnamese delicacy. However, since I'm currently trying out a Joylent-only diet, I'll only be able to eat it after a couple of days.

So my questions are:

1. 
   

   How long can I safely store Bánh chưng in the fridge?

   
   


2. 
   

   Can I preserve it somehow? I've heard that some people boil or freeze it.