Kroger's Coké Zero knockoff was pretty good. I also buy Costco's store branded 24 packs of bottle water since they're like $3 and are perfectly fine. Their store-brand detergent smells really good, too.
Most of the stuff Trader Joes sells is store-brand, and they have the best alkaline water I've tried. Their regular joe basic bitch coffee is pretty good, and honestly, I like it more than any of their other coffee. But if you really want caffeine, try their chocolate-covered espresso beans. Eat a bunch and let yourself get carried away and you'll act like a methhead, they're so good and strong.
TJ's orange juice isn't very good, though.
Speaking of coffee, Target sells a really, really cheap store-brand coffee. It doesn't taste all that bad for the price, but it left me feeling... weird. Like, very twitchy and uncomfortable, and I'm always consuming copious amounts of caffeine. So don't buy that.
Dollar Tree's caffeine pills work pretty well, too. They're a little weak, but just take like three or four and you'll be good. Don't bother with their B12, though, that stuff is a comically low 50mg when most supplements are around the 1000-1500mg range.
And like you mentioned with your ibuprofen, store brand medicines are just the exact same thing. I bought a two-pack of Costco ibuprofen and, despite taking a lot of it, it still managed to expire before I ran out. In fact, I just checked, and it expired in May 2018, but still works perfectly fine. Same with Neosporin, aspirin, and this Costco-branded "Aller-flo" nose spray stuff I discovered after finding out about Flonase and looking up exactly what it was, and checking around for generics.
