kyou ha zidouhanbaiki no otya de ha naku, ie kara suitou wo motte kita.

今日 means today, and 今日は makes today the topic: as for today or today, ...

This does not just mean simple time marking. It adds a slight contrastive feeling, like:

• Today, I didn't do the usual thing.
• As for today, I brought a bottle from home.

So 今日は sets up the sentence as talking about what happened today in particular.

Literally, it is the tea of the vending machine, but in natural English it means:

• tea from the vending machine
• vending-machine tea

Here, の connects 自動販売機 and お茶 and shows that the tea is associated with the vending machine — in other words, tea bought there.

It does not mean the tea somehow belongs to the machine in a possessive sense. Japanese の is broader than English 's and often means things like:

• from
• at
• related to
• type of

Because the sentence is contrasting two choices, not describing two actions.

The structure is:

• A ではなく、B
• not A, but B

So here the speaker is saying:

• not vending-machine tea
• but a bottle brought from home

This is different from お茶を飲まずに, which would mean without drinking tea. That would focus on the action of drinking, but this sentence focuses on the item chosen.

In ではなく, the は is part of the set phrase and adds contrast.

You can think of it like this:

• で
  • は
    • なく
• roughly: is not / rather than

With nouns, ではない is a common negative form related to だ.
Then ではなく is the connecting form meaning:

• not... and instead...
• rather than...

So in this sentence, お茶ではなく means not tea or rather than tea.

In casual speech, people often say じゃなく instead of ではなく.

Because お茶 is not being marked as the direct object of a verb here.

If the sentence said something like:

• 自動販売機のお茶を飲まなかった
• I didn't drink vending-machine tea

then お茶 would take を.

But in your sentence, お茶 is part of the contrast structure:

• 自動販売機のお茶ではなく、家から水筒を持ってきた

So お茶 is linked to ではなく, not to a verb as a direct object.

Because から means from, and the sentence is talking about the starting point.

• 家から = from home

That fits 持ってきた very well: the speaker brought the bottle from home to the current place.

By contrast:

• 家で = at home (location of an action)
• 家に = to home / at home depending on context

So:

• 家から水筒を持ってきた = I brought a bottle from home

水筒 usually means a water bottle, thermos, or flask—a container you bring with you for drinks.

It often suggests a reusable personal drink container, not just any random bottle.

So depending on context, it could be translated as:

• water bottle
• thermos
• flask

In this sentence, it implies the speaker brought their own drink container from home instead of buying tea from a vending machine.

Because 持ってくる means to bring—literally, to carry and come.

• 持つ = to hold / carry
• 持ってくる = to bring (toward the current location)
• 持ってきた = brought

So 家から水筒を持ってきた means:

• I brought a water bottle from home (to here).

If you only said 持った, it would mean held or carried, but it would not clearly express the idea of bringing it from one place to another.

This is about direction relative to the speaker's point of view.

• 持ってきた = brought (toward here / to where I am now)
• 持っていった = took (away / to another place)

Since the speaker is now at the destination and talking about having brought the bottle there from home, 持ってきた is the natural choice.

A simple way to remember it:

• くる = come
• いく = go

So the bottle came here with the speaker.

Japanese often leaves out the subject when it is obvious from context.

In this sentence, the natural interpretation is:

• I didn’t get tea from the vending machine; I brought a bottle from home.

Japanese does this all the time. If the subject is clear, it is usually omitted.

So even though there is no explicit 私 or 僕, the sentence still sounds complete and natural.

Yes. It has a mild contrastive and slightly practical/self-disciplined feel.

The structure suggests something like:

• instead of buying tea from the vending machine,
• I brought my own bottle from home.

Depending on context, this can imply things such as:

• saving money
• being prepared
• making a healthier or more eco-friendly choice
• doing something different from the usual routine

So the sentence does a little more than just state facts—it subtly contrasts buying something with bringing your own.