These can be smoothies, bars, drinks, supplements, etc.
Is there something specific you look for (ex. price, ingredients, specific nutrients etc.)?
Is there a brand you like / avoid (ex. soylent, huel, hol food, etc.)
Edit:
I definitely don’t recommend fully replacing your diet with them. I know some people use them instead of other processed food / fast food / skipping meals entirely, and that’s the use case I had in mind for myself
Grab some fruit, or salad, slam a quality protein shake (no/low sugar).
My go-to is a bag of trail mix from the dollar store. $1.34 with tax, and it’s 700 calories with decent macros.