Nissan Repair: 2003 Altima, engine coolant, coolant

Question
Looking for an answer to a simple question, but cannot find any products to purchase, nor answers to it so:  in my 2003 Altima there is a white bottle mid-way up the left side of the engine that reads "Refrigerant Engine Coolant".  Duh, obvious, right?  Well it's empty and when running just air (not the A/C) the car is filled with hot air (so when it's 75 outside i am getting hot air thrown over me making it feel like 85).  What is this "Coolant" bottle specifically meant to hold and/or where can I buy it?  I asked the Nissan guys when i was at the the shop last week in passing and they mentioned something authorized technican only can replace this.  Can you help?
Thanks,
jasma12<at>gmail.com

Answer
Hi -

The bottle is designed for coolant, or antifreeze for the radiator. It should be halfway full to accept the overflow when the engine gets warmed up.

Regarding the blower, if the engine is warmed up, the air will be warmer, specifically because the air gets warmed up by the engine. The only way that you can make it cooler is to run the A/C with a higher setting.

Hope this helps -
aloha
calvin