Vi har hver sin skraldepose i køkkenet, så det er lettere at holde køkkenet rent.

Hver sin means each their own or more literally each his/her own.

So:

Vi har hver sin skraldepose
= We each have our own trash bag

This is a very common Danish pattern:

• hver = each
• sin = his/her/its own (reflexive possessive)

The idea is that every person in the group has one separate item.

Because sin shows that the item belongs individually to the members of the subject.

Compare:

• Vi har vores skraldepose = We have our trash bag
  This sounds like one shared bag.

• Vi har hver sin skraldepose = We each have our own trash bag
  This makes it clear that there is one bag per person.

So sin is used here because the ownership is distributed individually, not shared collectively.

Because after hver sin, Danish normally uses the singular noun.

The logic is:

• each person has one bag
• so Danish says each own trash bag, not each own trash bags

That is why:

• hver sin skraldepose = correct
• not hver sine skraldeposer

Skraldepose means trash bag or garbage bag.

It is made up of:

• skrald = trash, garbage
• pose = bag

So it is a compound noun, which is very common in Danish.

Because i means in, and a kitchen is treated as an enclosed room.

So:

• i køkkenet = in the kitchen

You would use på for certain locations, surfaces, islands, and some set expressions, but for rooms in a house, i is the normal choice.

Because the two instances do different jobs:

• i køkkenet = tells you where the trash bags are
• holde køkkenet rent = tells you what is being kept clean

So the sentence means:

We each have our own trash bag in the kitchen, so it is easier to keep the kitchen clean.

Even in English, repeating the kitchen is perfectly natural here.

Here så means so or therefore.

It links the first idea to the result:

• Vi har hver sin skraldepose i køkkenet
• så det er lettere at holde køkkenet rent

So the structure is:

We each have our own trash bag in the kitchen, so it is easier to keep the kitchen clean.

Det er lettere means it is easier.

A few things are happening here:

• det = it
  This is a dummy subject, just like English it in it is easier
• er = is
• lettere = easier, the comparative form of let

So:

• let = easy/light
• lettere = easier

In everyday Danish, people also often use nemmere for easier.

Literally, it means to keep the kitchen clean.

Here:

• at holde = to keep
• køkkenet = the kitchen
• rent = clean

So holde does not mean physically hold here. It means keep or maintain in a certain condition.

This is a very common pattern in Danish:

• holde huset varmt = keep the house warm
• holde døren åben = keep the door open
• holde køkkenet rent = keep the kitchen clean

Because rent agrees with køkkenet, which is a neuter noun (et køkken).

The adjective ren changes form depending on grammar:

• en ren stol = a clean chair
• et rent køkken = a clean kitchen

In holde køkkenet rent, the adjective still describes køkkenet, so it takes the neuter form rent.

It is best understood as an adjective describing køkkenet, not as an adverb.

In holde køkkenet rent, the meaning is:

• keep the kitchen clean

So rent tells you the condition of the kitchen. It functions like an object complement.

That is why it agrees with køkkenet:

• holde bordet rent = keep the table clean
• holde døren lukket = keep the door closed

Because så here works like so/therefore and introduces a new main clause.

Main clause word order in Danish is normal here:

• det er lettere

If something else had been placed first in the clause, then the verb would come before the subject because of Danish V2 word order. But here the subject det comes first, so the order is simply:

• subject + verb = det er

Yes, in everyday spoken Danish you may hear hver vores, for example:

Vi har hver vores skraldepose

This also means We each have our own trash bag.

However, hver sin is the more traditional and often more standard form in grammar explanations. So for a learner, hver sin is a very useful pattern to know well.

Yes, it is natural and clear.

It means:

We each have our own trash bag in the kitchen, so it is easier to keep the kitchen clean.

The sentence sounds practical and everyday. It uses several very normal Danish patterns:

• hver sin
• så for result
• det er lettere
• holde noget rent