Seltzer Coke Bottle

This is a quick and dirty trick for the unusual uses contest. It is not fully tested (I have to test how long the bottle would keep carbonated). But you can do it just for fun.

You need:
Full 2 litre bottle of black soda beverage (Coke or Pepsi would do the trick).
Empty 2 litre bottle of soda seltzer, with siphon-like cap.
A blade or knife.

The most difficult part is removing top from seltzer bottle. You have to use all your strength. You should also make sure the bottle is un-pressurized. I kept pushing the lever until fully un-presurized.

I have to confess I cheated since I removed the seltzer cap two weeks ago trying to refill the bottle with a mix of tartar and soda (if you wonder why did I try refilling the cheapest beverage, take in mind it is a heavy bottle that is not sold in all shops, so I am too lazy to carry it).

When you have the seltzer siphon cap in your hands, open the black bottle and put the seltzer siphon top (along with its attached pipe) into the black bottle.

It is likely you notice you can't secure the siphon ring into the black bottle due the plastic ring of the original cap. So you'd better cut it. I cut it with a blade, but a knife will do the trick.

Now you can insert the siphon top into the black soda bottle. You can push the lever to release the air from the pipe as you insert it.
Then, turn the siphon top until it is tightly secured.
You can see some bubbles in my bottle-- this probably means the top is not tight, or maybe the siphon mechanism is broken.
You can now serve your favourite soda beverage with style!

Well, after a pair of 100ml cups, I discovered I had to press the bottle to keep the pressure inside, or cok* would not flow from the inside.

Also, I noticed standard refrigerator doors are made for 2l bottles with a standard cap. My hacked bottle is too tall for my refrigerator. Maybe this is why seltzer is sold in smaller 1.5l bottles.

Anyway, I find this is a funny hack to do for a party.