A V60 would be my suggestion. Freshly ground will always be better, but you can make perfectly good coffee with pre-ground.
Use the Coffee Compass I linked above to dial down the ratio between water and coffee. And ideally weigh both instead of eyeballing it, especially while still dialling in to make sure you’re comparing apples with apples.
Letting it bloom (wet the grains and then wait 30-60 seconds before continuing to pour the rest of the water), will also help to elevate your brew.
Probably the biggest difference in coffee taste is grinding your own beans. Pre-ground coffee doesn’t taste fresh and loses flavour within minutes/hours of being ground.
The Aeropress is all plastic and is very variable. Depends on how hard you press it, how long it’s left in the chamber first, grinds size and very often as you press, it slips through. I use it every day, but no idea why.
I used it on an expensive and strong glass thermal mug. After a year or so, the mug shattered due to stress. Another one of your ill thought through gimmicks I think
I have a 1Zpresso hand-grinder and it is such a beautifully machined thing to look at and hold, I think I’d still keep it if I gave up drinking coffee (wasn’t cheap though).
I then brew using a good old Moka. You don’t get the crema, but the flavour is great. Takes about three minutes to do both and very satisfying.
The two devices between them take up less space than the bag of coffee beans.
@anon77199223 Another one you could investigate, if you prefer something (slightly) more automated, is the Moccamaster Cup-one.
I haven’t used that one myself though, but I use the KBG Select almost daily. From about 4 cups, ~500ml I would recommend that one, but probably not for 1-2 cups.
This may be a slight quibble, but I think it would be safer to say that increasing dairy consumption above zero, using healthy dairy products, not unhealthy ones, can improve all cause mortality as long as the person doesn’t eat too much dairy.
And even that claim may be qualified by the statement that it depends what people who eat zero dairy eat instead of dairy.
That’s what the cup-one is for, sorry if that was unclear. The Cup-one is designed for a single cup (perhaps two?). I just don’t have any experience with it myself.
The remark regarding 4 / 500ml was referring to the KBG Select which I do have myself and use almost daily.
If you don’t want to hand grind, nor want to spend crazy money, I found the Bodum conical burr grinder to be ridiculously good value for money. As a bonus it’s also not as ugly as most “good” grinders, which are a 3+ times its price.
If you’re willing to splurge just a little more, the Fellow Opus is what i’d recommend. Be careful of grinders that that they’re for espresso, as often the cheaper one’s cannot grind for non-pressurised baskets.
I generally like to do The Best research that I can when buying something, before I make my mind up, especially when I know very little about the product category.