If you want to avoid aspertame...take some seltzer or soda water and get some Da Vinci's root beer SF syrup or sf cola and make your own. They are both great!!!! I put canned whipped cream in my root beer and make a root beer float!

OR

Get Diet Rite soda. They are sweetened with splenda.

But...I only drink soda's as a treat, My main liquid of choice is spring water and LOTS of it!
FWIW
Judi