Jeg tager kaffe med i en termokop, når jeg pendler.

Because tage ... med means take/bring something along.

• tage on its own usually means take
• tage noget med means take something with you / bring something along

So:

• Jeg tager kaffe. would sound incomplete or odd in this context.
• Jeg tager kaffe med. means I bring coffee along.

In this sentence, med is an important part of the meaning.

This is normal Danish word order with this kind of verb phrase.

In tage noget med, the object often goes between the verb and med:

• Jeg tager kaffe med
• Hun tager sin computer med
• Vi tager børnene med

So med is not misplaced. It works a bit like a particle in English phrasal verbs, where the object can come in the middle:

• take coffee along
• take your bag along

That is why kaffe comes before med here.

Because kaffe is being used as an uncountable noun, like coffee in English.

Compare:

• Jeg drikker kaffe. = I drink coffee.
• Jeg tager kaffe med. = I bring coffee along.

If you were talking about a coffee as one serving or one cup in a more specific way, Danish might use a different structure, for example:

• en kop kaffe = a cup of coffee

But here the speaker just means coffee in general, so no article is needed.

It means in a travel mug / thermos cup / insulated cup.

• i = in
• en termokop = a cup designed to keep drinks hot or cold

So the phrase tells you how the coffee is being carried: it is inside a thermal mug.

A very natural English translation would often be in a travel mug.

Because termokop is a common-gender noun in Danish, so it takes en.

Danish nouns have two grammatical genders:

• en-words
• et-words

termokop belongs to the en group:

• en termokop
• termokoppen = the travel mug

Unfortunately, gender usually has to be learned with each noun.

Pendler means commute or travel regularly between home and work/study.

The verb is at pendle = to commute.

So:

• jeg pendler = I commute

It usually implies repeated, routine travel, not just one single trip.

Because når is used for something that happens regularly, repeatedly, or whenever something happens.

Here the meaning is habitual:

• Jeg tager kaffe med i en termokop, når jeg pendler.
• I bring coffee in a travel mug when I commute.

This suggests a repeated situation, not one specific past event.

A useful contrast:

• når = when / whenever for repeated or general situations
• da = when for one specific event in the past

So this sentence uses når because commuting is a routine.

Because Danish, like English, often uses the present tense for habits and routines.

This sentence describes something the speaker usually does:

• Jeg tager kaffe med ... = I bring coffee ...
• når jeg pendler = when I commute

It is not talking about one specific trip happening right now. It is a general habit.

Yes, absolutely. That is a very natural alternative.

When the sentence starts with the når clause, Danish uses inversion in the main clause:

• Når jeg pendler, tager jeg kaffe med i en termokop.

Notice the order:

• not Når jeg pendler, jeg tager ...
• but Når jeg pendler, tager jeg ...

This is a very important Danish word-order rule: when something other than the subject comes first, the verb usually comes before the subject in the main clause.

It can correspond to either take or bring, depending on the English point of view.

• Danish tage noget med focuses on carrying something along with you.
• In English, that might be take coffee with me or bring coffee along.

So in this sentence, both of these are possible ideas:

• I take coffee with me in a travel mug when I commute.
• I bring coffee along in a travel mug when I commute.

English chooses take or bring more strictly by perspective; Danish is often less strict here.

No. Termokop is good and understandable, but Danish speakers may also use other words depending on the exact object.

Possible alternatives include:

• termokrus = thermal mug
• rejsekrus = travel mug
• to-go-kop = to-go cup

So termokop is fine, but it is not the only possible word. The best choice depends on whether you mean a reusable insulated mug, a travel cup with a lid, or something else.