Μην ξεχάσεις το τάπερ σου στο ψυγείο· η πιατέλα είναι για όλους, όχι μόνο για εσένα.

Because Greek usually forms a negative command with:

• μη(ν)
  • subjunctive form

So:

• ξεχνάω = I forget / I am forgetting
• να ξεχάσεις = that you forget / for you to forget (subjunctive form)
• μην ξεχάσεις = don’t forget

This is very common in Modern Greek.
Greek does not normally use the plain imperative with δεν to make a negative command.

Compare:

• Ξέχνα το. = Forget it.
• Μην το ξεχάσεις. = Don’t forget it.

So Μην ξεχάσεις is the normal, idiomatic way to say don’t forget.

Ξεχάσεις is the 2nd person singular aorist subjunctive form of ξεχνάω / ξεχνώ.

In this sentence, that matters because the speaker is talking to one person:

• (εσύ) μην ξεχάσεις = don’t forget (said to one person)

Why the aorist here?
In commands, the aorist often refers to a single complete action, not an ongoing one. So μην ξεχάσεις means:

• make sure you do not forget

If you were speaking to more than one person, you would say:

• Μην ξεχάσετε = Don’t forget (plural / polite singular)

Τάπερ is a very common everyday Greek word borrowed from Tupperware. In modern usage, it usually means:

• a plastic food container
• especially the kind used for leftovers or packed food

It is treated as a neuter noun, which is why you get:

• το τάπερ

Even though it comes from a brand name, in everyday Greek it often works like a normal common noun, much like English speakers sometimes use brand names generically.

Σου here is the weak possessive pronoun meaning your.

Greek often places these weak possessive forms after the noun:

• το βιβλίο μου = my book
• η τσάντα σου = your bag
• το τάπερ σου = your container

So the most basic pattern is:

• article + noun + possessive

You can sometimes move the possessive for emphasis in other contexts, but το τάπερ σου is the normal, neutral order.

Greek usually keeps the definite article even when a possessive is present.

So where English says:

• your container

Greek normally says:

• το τάπερ σου
• literally: the container your

This is completely standard in Greek. The same happens with many nouns:

• ο φίλος μου = my friend
• η μητέρα της = her mother
• τα κλειδιά μας = our keys

So the article is not extra or unusual here; it is part of normal Greek grammar.

Στο is a contraction of:

• σε + το → στο

So:

• σε = in / at / to
• το ψυγείο = the fridge
• στο ψυγείο = in the fridge / into the fridge / at the fridge, depending on context

In this sentence, the natural meaning is in the fridge.

A useful pattern:

• στο σπίτι = at home / in the house
• στο τραπέζι = on the table or at the table, depending on context
• στο ψυγείο = in the fridge

Greek σε can cover several relationships that English expresses with different prepositions.

Yes, that is the literal structure.

The phrase means something like:

• Don’t leave your container behind in the fridge
• Don’t forget your container in the fridge

Greek does not need a special verb like leave behind here. Using ξεχνάω with the location makes the meaning clear.

So the structure is:

• Μην ξεχάσεις = Don’t forget
• το τάπερ σου = your container
• στο ψυγείο = in the fridge

Together: Don’t forget your container in the fridge.

That symbol is called the ano teleia in Greek. It often works like a pause stronger than a comma and is commonly equivalent to:

• a semicolon
• sometimes a colon

In this sentence, it separates two related statements:

• Μην ξεχάσεις το τάπερ σου στο ψυγείο
• η πιατέλα είναι για όλους, όχι μόνο για εσένα

So it is helping the writer connect two ideas:

1. don’t leave your own container behind
2. the shared platter is for everyone

You do not need to pronounce it specially; just make a natural pause.

Πιατέλα means a large plate, serving platter, or tray used for serving food.

It is different from a regular plate:

• πιάτο = plate
• πιατέλα = platter / serving dish

So in this sentence, η πιατέλα είναι για όλους suggests that there is a shared serving dish that everyone may take food from.

Because πιατέλα is a feminine noun.

So its article is:

• η in the nominative singular

That is why the sentence says:

• η πιατέλα είναι...

Some useful comparisons:

• το πιάτο = the plate (neuter)
• η πιατέλα = the platter (feminine)

The article tells you the gender, and the verb είναι stays the same because Greek to be does not change for gender.

Because για means for, and it is followed here by the accusative case.

The pronoun όλοι means all in its basic dictionary form, but after για you need the accusative:

• όλοι → όλους

So:

• για όλους = for everyone / for all

This is a very common pattern:

• για μένα = for me
• για σένα = for you
• για όλους = for everyone

Because the preposition για belongs with both parts of the contrast.

The sentence is saying:

• for everyone
• not only for you

So Greek keeps the same preposition:

• για όλους, όχι μόνο για εσένα

This is very natural and parallels English:

• for everyone, not only for you

Leaving out για would sound wrong here.

Yes. Εσένα and σένα both mean you in this kind of context.

• εσένα = fuller, more emphatic form
• σένα = very common shorter form

So these are both possible:

• όχι μόνο για εσένα
• όχι μόνο για σένα

The version with εσένα can sound a little more explicit or emphatic, which fits the contrast after όχι μόνο.

Similarly:

• εμένα / μένα = me
• εσένα / σένα = you

Because after για Greek needs the strong pronoun, not the weak clitic.

Compare:

• σου = weak form, usually meaning to you / your
• εσένα = strong form, meaning you

So:

• το τάπερ σου = your container
• για εσένα = for you

You use σου as a short attached form, but after a preposition like για, Greek normally uses the strong pronoun:

• για μένα / εμένα
• για σένα / εσένα
• για αυτόν
• για αυτήν

Yes: the order is very natural for contrast and emphasis.

Greek first gives the broad statement:

• η πιατέλα είναι για όλους = the platter is for everyone

Then it narrows the contrast:

• όχι μόνο για εσένα = not only for you

That second part corrects or limits an implied attitude: maybe the listener is acting as if the shared food is just for them.

So the sentence structure helps the speaker sound slightly corrective:

• It’s for everyone, not just you.

It depends on tone.

Grammatically, the sentence is neutral, but pragmatically it can sound:

• friendly and practical, if said casually
• mildly corrective, especially in η πιατέλα είναι για όλους, όχι μόνο για εσένα

That second clause suggests the speaker is reminding someone not to behave selfishly around shared food.

So the exact feeling comes more from context and tone of voice than from any unusual grammar.