Suggestions on meal replacement shakes?

Hi guys- the struggle is so rough with Gerd. I’ve found the only thing I can eat that doesn’t come immediately back up is crackers. Luckily my endoscopy is on the 5th of July so hopefully more answers then. Can anyone recommend a shake/smoothie that you tolerated well? I’m losing so much weight and feeling weak. Would love to try and get more into my body with something that doesn’t make me immediately regret eating. Thanks in advance