I have been using the medicine cup. Tried to estimate yesterday but totally lost count. Luckily I finished two 12 oz G2 bottles, so I knew I had at least 24 oz.
The medicine cup also helps the liquid to warm up, which goes down a little smoother for me. I usually sip three times out of each 1 oz. cup. Once I get a cup down, I make a tally mark.
Ridiculous, but I'm scared to be dehydrated. They had to stick me 4 times to get the IV in and I have three terrible bruises, I don't want to have to go in for an IV if I can help it.
4 days down, woohoo!