18/8 food-grade stainless steel construction ensures durability and safety
Thermo 3D double wall vacuum insulation keeps drinks hot or cold for extended periods
Powder coat exterior provides a secure, non-slip grip
Splash-proof press-fit slide lid prevents leaks and spills
Compatible with press-fit straw lid for versatile use as a water bottle
Summarized by Shop
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 everyda
Capacity
12 oz
Material
18/8 food-grade stainless steel
Insulation
Thermo 3D double wall vacuum
Lid Type
Press-fit slide lid (compatible with press-fit straw lid)
Cleaning
Dishwasher safe (top rack only)
Not suitable for
Freezing, microwaving, bleaching, overfilling, or over 3 years old
Summarized by Shop
4.8
491 ratings
5
4
3
2
1
Very pleased with my purchase!
Kelly · June 12, 2026
My new (and old) favorite coffee cup! I first found a miir cup in the thrift store and it became my all time favorite, until my husband lost it. So depite having several other thrifted cups I ordered this one new, with my name on it this time (haha). Such a great ethical company with the absolute best quality products. Tumbler lids have a distict shape that feels so nice to sip from, and the finish is beautiful. Keeps drinks piping hot, or ice cold.
![Photo of MiiR Tumbler (591ml/20oz) ( Black ) [ MiiR ] [ Reusable Cups ]](https://cdn.shopify.com/s/files/1/2404/0687/files/63c29418-bdfd-4df5-849c-a63482da51c8.jpg?v=1758893136&width=256)
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![Photo of MiiR Tumbler (237ml/8oz) ( Black ) [ MiiR ] [ Reusable Cups ]](https://cdn.shopify.com/s/files/1/2404/0687/files/miir_tumbler_8oz_black.jpg?v=1727809911&width=256)
![Photo of MiiR Tumbler (355ml/12oz) ( Black ) [ MiiR ] [ Reusable Cups ]](https://cdn.shopify.com/s/files/1/2404/0687/files/miir_tumbler_12oz_black.jpg?v=1727803876&width=256)
![Photo of MiiR Tumbler (473ml/16oz) ( Black ) [ MiiR ] [ Reusable Cups ]](https://cdn.shopify.com/s/files/1/2404/0687/files/miir_tumbler_16oz_black.jpg?v=1727454768&width=256)
