Is the MiiR Travel Tumbler worth it?

At $14.99 at eBay as of November 4, 2026, it is a cheap way to get vacuum insulation and a splash-proof lid. It makes the most sense if you drink small coffees or espresso drinks rather than large volumes of water.

How long does it keep drinks hot or cold?

MiiR rates the Thermo 3D double-wall insulation for hours, not all day. Expect hot coffee to stay drinkable through a morning commute and iced drinks to hold up for a few hours.

Is the lid leak-proof?

No. The press-fit slide lid is splash-proof, so it handles jostling in a bag or car but can seep if the tumbler is tipped or laid on its side.

Does it fit in a car cup holder?

Yes. The base is sized for standard car cup holders, and the body also fits under most under-counter espresso machines.

Can I use it as a water bottle?

Only with the MiiR Press-fit Straw Lid, which is sold separately. With the included slide lid it is a coffee tumbler, not a sealed water bottle.

The lowest new price seen is $14.99 at eBay as of November 4, 2026, against two stores listing it new. MiiR drinkware tends to dip during seasonal sales and bundle promotions.

Where is the Miir Travel Tumbler cheapest?

At Amazon, for $28.00, as of our latest check.

Where can I buy the Miir Travel Tumbler?

3 stores we checked sell it, including Amazon, eBay, MiiR.

Miir Travel Tumbler: lowest price $28.00 at Amazon

What reviewers say

Owners of MiiR drinkware generally rate the insulation and build quality well and like the powder-coat finish. The common complaint about the 12 oz tumbler is capacity: it empties fast for water drinkers and large-coffee drinkers.

Pros

Holds temperature for hours
Sturdy stainless build
Grippy powder-coat finish
Fits cup holders and espresso machines

Cons

Small capacity
Lid can seep if tipped
Straw lid costs extra

From MiiR

Insulated stainless steel travel tumbler with splash-proof press-fit slide lid
Fits standard car cup holders and most under-counter espresso machines
Thermo 3D double-wall vacuum insulation keeps drinks hot or cold for hours
Powder-coat finish improves grip
Compatible with Press-fit Straw Lid (sold separately) to use as an insulated water bottle
BPA-free construction with no flavor transfer between beverages

Sizes: 6oz, 8oz, 12oz, 16oz, 20oz, 24oz
Materials: 18/8 food-grade stainless steel; powder-coat exterior finish; BPA-free
Sizing: Available in 6 sizes; small Press-fit Slide Lid fits 6oz and 8oz, large fits 12oz, 16oz, 20oz and 24oz
Care: Wash before first use; hand wash recommended, lid is top-rack dishwasher safe; do not freeze, microwave, bleach, or overfill
Guarantee: Every MiiR product comes with a lifetime warranty; if it fails, MiiR provides a replacement and recycles the original
Returns: Re:Claimed Takeback Program: send back a used MiiR to be sorted and recycled and receive online store credit
Shipping: Free standard ground shipping within the contiguous United States on qualifying orders; orders ship within 2 business days (M-F), personalized items take 3-5 bu
Packs: Bundle & save up to 25%
In the box: Splash-proof press-fit slide lid

About the Miir Travel Tumbler

The MiiR Tumbler is a daily-driver travel tumbler built from 18/8 stainless steel with Thermo 3D double-wall vacuum insulation. Its sleek silhouette fits standard car cup holders and most under-counter espresso machines, while the powder-coat finish improves grip.

The included press-fit slide lid is designed to be splash-proof for everyday carry. Swap it for the MiiR Press-fit Straw Lid to turn the tumbler into an insulated water bottle.

Use it for

Hot coffee, tea, and cocoa

Iced coffee, cold brew, and water

Daily commutes, desk use, and travel