Just found out that they sell caffeinated water and Crystal Light on-the-go packets with caffeine on Amazon (and elsewhere I'm sure). I have acid reflux so I'm not really supposed to have soda or coffee or caffeine at all technically, but this allows me to precisely dose myself without added acid or the crap they have in soda.
Most of the caffeinated water brands have 60mg/500mL (16.9 fl. oz), and the crystal light on the go are the same, but you can get them in 120mg as well.
