TruEnamel Tumbler

Regular price $14.98
Regular price $29.95 Sale price $14.98
Sale Sold out
12 reviews

TruEnamel Tumbler

Regular price $14.98
Regular price $29.95 Sale price $14.98
Sale Sold out
12 reviews
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Orders over $75 ship free!
(U.S. standard ground only)


Product Description

Introducing your new favorite cup. The 12oz TruEnamel™ brings first-of-its-kind innovation with a familiar feeling. The pure fired-glass TruEnamel coating features a smooth drinking surface, making that first morning sip even smoother. Add in vacuum-insulated stainless steel for that cozy (or cool) feeling you can take with you anywhere. Not to mention it sits pretty on the shelf.


Wash before first use. Hand wash recommended, do not use abrasive cleanser or wire brushes. Lid top rack dishwasher safe. Do not freeze, do not microwave, do not bleach, do not overfill. Left unwashed, dark liquids will stain.

CAUTION: Choking hazard, may contain small parts not suitable for children under 3 years.  When filled with hot liquids and keep hot liquids out of reach of children. *Note the Press-fit Slide Lid is not leakproof.

What Lids Are Compatible?
Press-fit Slide Lid

Press-fit Slide Lid - Large

Compatible with 12oz TruEnamel

View Product ›

Press-fit Straw Lid

Press-fit Straw Lid

Compatible with 12oz TruEnamel

View Product ›

Shipping & Returns

Do I have to pay for shipping?

MiiR offers free standard ground shipping within the contiguous United States for orders $75 and over. Standard ground orders under $75 are subject to a flat rate shipping fee of $9.95 USD. Expedited and international rates, if applicable, will be calculated in the checkout once you have entered your shipping address.  A shipping charge will be applied to your final order in all other scenarios.

When will my order ship?

We do our best to ship your order within 1-2 business day of purchase, M-F. Exceptions may occur if there is a question regarding your order, in which case we will contact you directly.  If you have questions about your order, please contact at

MiiR uses FedEx, UPS, and USPS (depending on the best rate) for shipments within the contiguous United States unless an expedited option is selected by the customer.

2-Day and Overnight orders should be placed by 7:00 AM PST for quickest delivery. Expedited orders placed after 7:00 AM PST will require an additional business day for processing. This excludes weekends and holidays. All "Delivery by" dates are estimates and not guaranteed. 

Shipping to Hawaii 

Shipments to Hawaii will be automatically upgraded to a 2-day delivery service. Furthermore, please note that shipping remains free for orders over $75.

Keeps Drinks Cold or Hot Longer

Our Thermo 3D® Double wall vacuum-insulation keeps hot drinks hot and cold drinks cold.

Ultra-Smooth Drinking Surface

Real fired-glass enamel imparts no smell or flavor to your beverage.

Splash Proof

TruEnamel™ Tumbler comes with the Press Fit Slide Lid that's both splash proof and shatter proof.

Design Forward

Enduring 18/8 Stainless Steel material and pure fired-glass enamel meets beautiful design with a minimalist silhouette. BPA free.

Generosity Driven

Every MiiR product sold helps fund nonprofit organizations that work to empower communities, while investing in the health of our natural environments.

Customer Reviews
3.5 Based on 12 Reviews
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Peter R.
United States United States

Functional, but a Bit Prosaic

The tumbler works well generally, but isn't as secure as some of my others for holding my tea to drink later. However, in its favor, and the reason I bought it, is that it fits into my new car's cupholders, unlike my others. I also had a problem with the slide closure on the lid's loosening up, but Miir was very responsive to my telling them about the problem and not only replaced the slide, but gave me a free replacement lid. I'm very pleased with their customer service! Also, for a product from a "design-driven" company, I'm disappointed it's available only in black.

United States United States

Not so hot

Love the Miir flip traveler - the 12 oz keeps my coffee quite hot for over 3 hours. I tried the enamel tumbler to have a neutral material for coffee at home but, disappointingly, it keeps the coffee warm for barely an hour. Even with the lid on and closed. I like the concept of the enamel over insulated stainless but the insulation just isn't the same as the regular stainless. The lack of sufficient insulation should be disclosed on the website. I'd return if I could.

Chris C.
United States United States

Would not purchase again!

I ordered a tumbler and a mug and both seem very light and cheaply made! Lids are poorly contructed and leak when used so I just had to toss them away! After a few uses I ended up disposing both into the recycle bin. I've tried all the main brands and Miir is the worst by far!

andrew b.
United States United States


Mug itself is pretty nice nothing special. The lid is supposed to be spill or splash proof and it is not.

United States United States


I've searched for a travel mug that doesn't hold the coffee smell-and the TruEnamel stands up to the test. The glass on the outside makes the mug less ruff and tumble, but it's more sturdy that a ceramic mug from the cupboard by far. I would have liked to see a more secure lid, this mug can't be tipped more than 45° without some spilling taking place. Overall: TruEnamel Tumbler is worth it, but hoping for an upgrade to the lid.