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
While I think in theory it’s possible for them to work–and they might indeed work for specific people with specific needs–a percentage of people using them are probably of a similar type to others who have gravitated towards food fads through the past century.
Like, if you hit up the Wikpedia or some history site and look at food/diet ads from 100 years ago, those products look pretty ridiculous to modern eyes. But they’re marketing the same thing, right? Health? Convenience? They’re targeting people who are desperate for solutions to their problems, using marketing language common to that era.
And I think a large percentage of these meal replacement products are doing the same thing to modern people, that all the “health food” stuff from decades prior did to our grandparents and great-grandparents. People are, after all, people, and it’s easy to fall for marketing regardless of what era you live in.
That’s the thing, fad diets aren’t bad by definition. As long as you’re getting all your nutrients, it’s fine, and you’re unlikely to get malnutrition from replacing your breakfast with a shake, or a guava, or a steak.
If it helps you eat fewer calories, and doesn’t overly hurt your micronutrients, it works.
For a while I was skipping lunch or eating junk food due to work pinning me down for 80 hours a week. I wanted something fast but healthy and not expensive. Prepared meals cost too much, delivery apps only raise the price.
I had heard of soylent before and found ready-to-drink was available at Target. Not bad, but not good. Too sweet for me. After looking into these things more I eventually settled on Mana as they seemed to be the most focused on nutrition and constantly improving their product. I’ve been getting their powder by subscription ever since to replace one meal a day (usually breakfast). Comes out to less than 5 minutes and $2 a day. It’s borderline bland, which makes it easy to have fun with. Add chocolate powder, some mango juice, or leftover coffee from the French press, whatever to break out of the “I’m only eating this for sustenance” monotony.
I apologize if this isn’t right to ask, but what issue did you have with skipping lunch? Some cultures practice intermittent fasting anyway, and I’d argue that many people in modern day don’t necessarily need 3 meals a day. If you’re doing something active or physically demanding like a manual labor job or getting in a workout, sure, you’ll need more energy. But if you’re sitting in an office all day and don’t work out or anything that day, I’d argue a lot of us out there really don’t need 3 meals a day.
I’m not trying to say that you, personally, should be skipping meals. I don’t at all know you or your situation. I was just curious about it.
Blend some (1/4 cup or so) oatmeal into a powder. Put in 1-2 TBS peanut butter. Then add milk/yogurt/fruit/a little vanilla/some honey whatever you want. You can make your own liquid meal replacement without all the processing in commercial options, for less money and it’ll be fresh.
If you want something fast but it doesn’t have to be drinkable, mix 2-4 TBS peanut butter and 1/2 cup or so of oatmeal in a little bowl. Microwave for like 30 seconds to a minute or so. Add a couple TBS of juice or a small handful of chocolate chips. You’ve now got a basic “energy bar” that can be eaten with a spoon. Can also function as a light desert or sweet, healthy snack.
I think stuff that’s churned out in huge quantities, packaged in plastic, shipped around and designed to be shelf stable is questionable at best. If microbes won’t even digest it (which would make it go bad) how digestible is it for people?
Oatmeal and peanut (or other nut) butter is real food and it only takes a minute or two to mix up something basically the same as one of those replacement options, but made fresh. For my basic vitamins daily, I’ll have a bowl of plain cheerios (somewhat processed but better than a pressed vitamin) and some fruit. Maybe some greens here and there. (I’ll also try to hide some marmite in something, to up my B12 as I eat very little meat or dairy.)
All of these options are super cheap.
The premade soylents are pretty good, and I regularly have them with a protein bar as my lunch. They’re pretty expensive in my opinion, so I try and look for them on sale, but the ease of not having to prep lunch is often worth it. I try and keep it under $2 a bottle for the 14oz ones, which still feels expensive to me, but some of the lunches I prep are around that cost, and it’s way cheaper than going out to eat (I keep a spare one at work in case I ever forget to bring lunch)
I’ve lost 20lbs in the last 2 weeks replacing 2 of my meals a day with Soylent RTD drinks! They’re great for dieting!
I get a pretty good deal, ordering them by the case on Amazon.
Edit: YMMV, but I was eating a lot of crap and eating way too much. Soylent makes it very easy to eat better and to control my caloric intake.
Should be careful about losing more than 1-2% of your bodyweight per week. Regardless, that sounds like amazing progress! Congrats!
I went from 206 to 186. I’m hoping to stabilize around 175-170. Good advice nonetheless, and thanks for the support!
One of the things I like the best about Soylent is that it’s both really tasty, and it’s also quite filling. Sometimes I get the urge to snack, so I just eat some fruit such as an apple or pear. 
It’s 1% of my body weight edit: oops, my math was off! (from 206 to 186), and I expect it to stabilize at about 175-170. I was overeating a lot, and I had recently gained a bunch of weight that I’m now losing again due to correcting my diet. 
I mix Huel shakes for lunch when I don’t have leftovers from dinner to eat. It’s healthy (I think), convenient, inexpensive, and it tastes fine.
