Premium insulated drinkware

Billions of Sovereign Beings.
One Humanity.

Double-wall vacuum insulated stainless steel tumblers, laser-engraved with the HARMŌNI US emblem. Built to last. Designed for everyone.

Shop tumblers Our philosophy

Our philosophy

A drinkware brand for the sovereign individual.

HARMŌNI US exists for the conviction that every person carries an irreducible dignity and the right to self-determination — and that this shared truth is what binds us as a single human family. Our tumblers are objects you live with daily; each one is engraved as a small, quiet reminder of that idea.

No country. No tribe. No team. Just a person, a vessel, and a belief held in common.

The collection

Tumblers, in every form you need.

Two capacities. Five finishes. Each tumbler is laser-engraved with our emblem and ships from our independent storefronts on Amazon and eBay.

20 oz Everyday tumbler

Sized for a generous coffee, a long workday, or a single hike. Fits standard car cup holders.

HARMŌNI US 20 oz insulated tumbler in Matte Black with laser-engraved emblem

20 oz Tumbler — Matte Black

Powder-coated matte black with brushed stainless rim and base. Soft-touch finish that resists fingerprints.

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HARMŌNI US 20 oz insulated tumbler in Midnight Blue with laser-engraved emblem

20 oz Tumbler — Midnight Blue

Deep navy powder coat over double-wall stainless steel. Subtle, refined, and built for daily use.

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HARMŌNI US 20 oz insulated tumbler in Brushed Steel with laser-engraved emblem

20 oz Tumbler — Brushed Steel

Raw brushed stainless steel — the most timeless finish in our collection. Lets the engraving speak for itself.

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HARMŌNI US 20 oz insulated tumbler in Army Green with laser-engraved emblem

20 oz Tumbler — Army Green

Olive-toned matte powder coat. A grounded, earthy finish that pairs naturally with outdoor wear.

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HARMŌNI US 20 oz insulated tumbler in Blush Pink with laser-engraved emblem

20 oz Tumbler — Blush Pink

A soft, warm pink with a matte finish. Quiet, considered, and decidedly modern.

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30 oz Large-capacity tumbler

For long drives, hot afternoons, and anyone who'd rather refill less often. Tapered base fits most cup holders.

HARMŌNI US 30 oz insulated tumbler in Matte Black with laser-engraved emblem

30 oz Tumbler — Matte Black

The flagship — full-capacity matte black with our emblem laser-engraved on the front panel.

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HARMŌNI US 30 oz insulated tumbler in Midnight Blue with laser-engraved emblem

30 oz Tumbler — Midnight Blue

Deep navy in the larger 30 oz form. A quietly serious vessel for the long haul.

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HARMŌNI US 30 oz insulated tumbler in Brushed Steel with laser-engraved emblem

30 oz Tumbler — Brushed Steel

Raw brushed stainless at full 30 oz capacity. The cleanest expression of the design.

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HARMŌNI US 30 oz insulated tumbler in Army Green with laser-engraved emblem

30 oz Tumbler — Army Green

Earthy olive matte finish in our larger size. Made for hot days and long trails alike.

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Specifications

Engineered for the long haul.

Double-wall vacuum insulation

Keeps hot drinks hot for hours and cold drinks cold all day. The vacuum between the inner and outer walls eliminates conductive heat transfer.

18/8 stainless steel

Food-safe, rust-resistant, and BPA-free. The same alloy used in commercial kitchens.

Laser-engraved emblem

Our mark is etched directly into the steel — not printed. It won't fade, peel, or wash off.

Sealed slide-lock lid

Each tumbler ships with a clear lid that resists splashes and reduces heat loss between sips.

Two capacities

20 oz (approx. 591 ml) for everyday use and 30 oz (approx. 887 ml) for longer outings. Both fit most standard car cup holders.

Hand-wash recommended

To preserve the powder-coat finish and engraving, we recommend hand-washing with mild soap.

Questions, answered

Frequently asked.

Where do these ship from?

Our tumblers ship through Amazon and eBay fulfillment networks. Click the buy link on any product above to see current shipping options and timelines for your address.

Why are products sold on both Amazon and eBay?

We list on both platforms so customers can choose whichever marketplace they prefer — same product, same engraving, same quality. Buy wherever you're most comfortable.

What does the emblem mean?

The HARMŌNI US mark sits above the words "Billions of Sovereign Beings, One Humanity." It's a daily reminder that individual sovereignty and shared humanity are not in tension — they're the same idea, looked at from two angles.

Are the tumblers dishwasher-safe?

We recommend hand-washing to extend the life of the powder-coat finish and the laser engraving. The interior stainless steel is fully food-safe and easy to clean.

How long do drinks stay hot or cold?

Performance varies by ambient temperature and how often the lid is opened, but in normal indoor conditions you can expect cold drinks to stay cold for most of the day and hot drinks to stay hot for several hours.