I've been on a clear liquid diet longer than most due to a leak and abscess. This site, some wonderful peops suggested to me Isopure protein ready to drink (RTD) bottles. I haven't found one that I like yet. However, the lady at Vitamin Shoppe was a bodybuilder and suggested this other clear liquid protein to me.... it's wonderful! It's called Cytomax Pure Protein Performance and they have three flavors: watermelon (red), tangerine (orange) and tropical (green). I haven't had the watermelon yet, but the other two are a bit tart at first.... but I really am enjoying them. I put them in a huge mug with ice and sip sip sip throughout the day. They have 40 g of protein per 20 oz bottles and nothing else is in the drink (essentially... a bit of sucralose perhaps). They are made of whey protein isolate (which is the second ingredient behind purified water). I got mine from Vitamin Shoppe but I have seen them online to order as well. Hope you enjoy!