I just learnt it from tv show just now. Not only for 'si lai' la. It's useful too for those who loves to eat snack food. Well, this is a method of keeping snack that you not manage to finish it at one time. You can use this method easily without any rubberband.
Step 1: Let the air out from the packet.
Step 2: Fold the opening of the packet 3 times.
Step 3: Turn at the back. Then fold the edge 45 degrees inward. Remember not 90 degrees. On both edges like the bottom photo.
Step 4: At the same side, fold one time. 
Step 5: You will see there is an 'opening'
Step 6: Push the middle from inside to outward. Only the middle ya..not the whole thing
Step 7: It will then looks like this. Only the middle would be outward
It looks like a bit bulky 
You see..it won't drop out..The tv shows prove that the water won't enter into the packet even it had been put into a pail of water. So, it also guarantee that the air won't enter into it.
P/s: The tv show says that ya...Don't find me if your snack become 'soft'. Haha =p
Oh ya...this method effectively used for 'keropok' plastic or cornflakes plastic like mine.
It is not suitable for bread's plastic which is too soft.
So, that's all for 'si lai' tips..hehe...see ya =)
3 comments:
haha..i knew it long time ago..maybe during uni life u got no astro to learn abt it =p
haha...ya la..now everyday at home only got time watch astro =p
i wan astro on demand jade dragon channel.....
yuk long pui tou....:p
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