Yep, Crystal Light has aspartame... and a tonne of sodium.
What doesn't is the Nestea version. Great flavours, lower in sodium, and flavoured with Sucralose, so none of the carcinogenic effects. And I understood that aspartame contributes to a lot more than cancer... alzheimers is implicated, as is a lot of formaldahyde related symptoms.
I don't know about you guys, but I dislike water, so getting my gallon per day is tough. Throw in a few of these packets, and 2 gallons is do-able.