Words you can hold.

A soft penguin with a little envelope on its chest. Tap your phone to the heart, and a letter from someone you love opens.

Reserve yours How it works
Grey MILUSU penguin facing forward, holding an envelope that reads “open me…” with a red heart

A letter that never runs out.

You write. They tap. The penguin keeps your words close, and there’s always room for the next one.

  1. MILUSU app home screen with a “Write a letter” button

    Write a letter

    Sign in to your MILUSU account and write a few lines, add a photo, or both.

  2. MILUSU app screen: “Tap the envelope on your penguin”

    Give the penguin

    Wrap it up or hand it over. Your letter waits behind the little envelope on its chest.

  3. A letter in the MILUSU app with an instant-style photo

    Tap and read

    They hold the top of their phone to the red heart. The envelope opens on screen, and there’s your letter.

A hand touching the top of a phone, screen up, to the red heart on a brown MILUSU penguin’s envelope; the MILUSU app on screen shows the “open me…” envelope
The top of the phone to the red heart. That’s the whole trick.

As many letters as you like

Write a new one whenever you want, and it waits for the next tap. Anyone with a MILUSU penguin can write to anyone else who has one, once you’ve added each other as friends.

No batteries, no charging

The tag inside the envelope is passive, so there’s nothing to charge.

No app to download

Letters open right in the phone’s browser. Works with modern iPhones and NFC-enabled Android phones.

For whoever you miss.

Distance is easier with something to hold on to.

  • Long-distance love

    A good-morning note on their nightstand, written from a different time zone.

  • Grandparents & grandkids

    A note from Grandma to open at bedtime, and a new one whenever she writes again.

  • Parents & kids

    Something from home for the first night away, and the nights after that.

  • Friends far away

    A photo, an inside joke, a few lines that say you’re still right here.

A gift for

  • Valentine’s Day
  • Anniversaries
  • Birthdays
  • Christmas
  • Moving away
  • Graduation

Meet the penguin.

Grey and Brown, alike in every way but color. Each comes in its own gift box, ready to give.

Brown and grey MILUSU penguins side by side
Grey and Brown
Brown MILUSU penguin with a white envelope that reads “open me…”
Brown
Close-up of the envelope on the penguin’s chest: “open me…” and a red heart
The envelope holds the NFC tag. Tap the heart to open a letter.
Grey MILUSU penguin peeking out of its open white MILUSU gift box
Comes in its own gift box, ready to give.
Grey MILUSU penguin sitting on a bedside table next to the bed
Within reach, every night.

Independently safety-tested.

MILUSU penguins were tested by an independent lab against U.S. toy safety requirements. Every applicable test passed.

Tested by Centre Testing International, a CPSC-accepted laboratory · Report No. A2260185306133 (August 2026) · Children’s Product Certificate on file

  • ASTM F963-23Standard Consumer Safety Specification for Toy Safety
  • CPSIA — total lead contentSubstrate, 15 U.S.C. §1278a
  • CPSIA — lead in surface coatings
  • CPSIA — phthalates16 CFR 1307
  • CPSIA — tracking labelsSection 103
  • 16 CFR 1303Lead-containing paint
  • 16 CFR 1501Small parts

Documentation available on request

Packing MILUSU penguins into white MILUSU gift boxes

Ready, boxed, and on the way.

Production is complete. The presale is now open.

MILUSU INC.

Good questions.

Anything else? Write to us at hello@milusu.com.

How does the tap work?

There’s a small NFC tag inside the envelope on the penguin’s chest. Hold the top of your phone to the red heart and a page opens in your browser. The envelope opens on screen, and the letter is inside: words, a photo, or both.

Which phones work?

Works with modern iPhones and NFC-enabled Android phones.

Does it need batteries or charging?

No. The tag is passive, so there are no batteries and nothing to charge.

Can I write more than one letter, or change what they read?

Yes, as often as you like. Write a new letter at any time and it waits for the next tap. Each tap opens the next letter.

If nothing new is waiting, they’ll find a letter from the penguin itself.

Who can send letters?

Everyone has their own penguin and their own account. Anyone with a MILUSU penguin can write to anyone else who has one, once you’ve added each other as friends. Letters go both ways, for as long as you keep writing.

Do we need an app?

No. MILUSU runs in the phone’s web browser, so there’s nothing to download, whether you’re writing a letter or reading one.

When does it ship?

We’ll email presale guests first with dates and details. No dates are set yet.

Is it safety-tested?

Yes. Centre Testing International, a CPSC-accepted laboratory, tested the penguin against ASTM F963-23 and the applicable CPSIA requirements, and every applicable test passed. A Children’s Product Certificate is on file. See the full list, or email us for the documentation.

Reserve yours.

No payment now. Join the list and we’ll email you first when orders open.

Questions first? Write to hello@milusu.com.

Which penguin? (optional)

No payment is taken. You’re joining a waitlist, not placing an order.