"Where is my next bottle?"
Translation:Gdzie jest moja następna butelka?
Yeah, seems better to me as well. Added, but this sentence teaches "następna", so it can only be an accepted option.
Is "moja" feminine because of "butelka" or the person speaking? Do I still use "moja" if I'm male? Thanks
Why doesn't "gdzie jest mojo butelka następna?" work? I thought word order wasn't particularly important because of the case system.
"mojo" is not a word
Please forget the 'word order is not important'. Forget it at all. Sure, it's more relaxed compared to many languages. But it's still important. Some sentences will simply be natural. However, different word orders will emphasize different things - the new, most important information will usually be at the end. Then, you will have word orders that are 'technically not wrong, but strange'. Mostly these will be things that sound as if they were taken from a song or a poem. And then you will have things that are just plain wrong.
Putting "mojo" aside, the problem in your sentence is that you put the adjective after the noun. In most cases, we don't do it. br0d4 explains it very well here: https://www.duolingo.com/comment/21465404
As we don't really accept diminutives unless there's a specific reason ("little cat"), I don't think that we should accept augmentatives unless there's a specific reason. Especially that you're probably the only person that actually reports those.
Could you explain to me why moja, nastąpna and butelka are all in the nominative and not instrumental when following a form of być?
Because the noun phrase "my next bottle" is in fact the subject of the sentence. If you imagine an answer, let's say "Moja następna butelka jest w kuchni", you can easily see that.
Putting it in Instrumental would be like definining "Gdzie" as being "my next bottle".