I used/use GNC's Lean shakes, they're the best tasting out of everything I tried. They have the powder but, I bought the premade bottled ones. It's only like $6 for a 4 pack I think or $14 for a 12 pack. They have vanilla, chocolate and strawberry. IMO the strawberry is amazinggggg and the vanilla is pretty good too! They only have 170 calories, 2 gm sugar, and 25 gm protein! And they smell like a milkshake unlike the other things I tried
Goodluck!