I grew up in Texas and always thought a 3 Liter of Soda was
something that was everywhere.  When I moved to California
I tried to look for some and didn't find any.  I asked some friends
and they looked at me like I was on Crack, they had never
seen them.  Well my parents came to visit and brought me
a couple ask PROOF! 

Close up of Diet Coke 3 liter

Close up of Diet Dr. Pepper 3 Liter

~VIVA TEXAS 3 LITERS~