Hario Stackable Glass Mug, Gray, 10 oz (300 ml)

A good everyday mug shouldn't be complicated: 10 ounces, comfortable to hold, and tough enough that you don't have to baby it. The Hario Stackable Glass Mug in light gray checks all three. It's made from borosilicate glass, the same heatproof lab-grade glass Hario has been making in Tokyo since 1921, so it handles boiling water, an iced coffee, or a quick spin in the microwave without complaint.

At 10 oz (300 ml), it's the right size for a pour-over brewed straight into the mug, a proper cup of tea, or hot chocolate without needing a refill. The squared handle is rounded on the inside edge so it sits comfortably in your fingers, and the mug is noticeably light because the glass is thin. One honest tradeoff there: thin glass doesn't hold heat as long as a heavy ceramic mug, so if you sip for an hour you'd end up warming it back up. If you drink at a normal pace, you'll never notice.

The stackable shape matters more than you'd think. These nest neatly on top of each other, so a set of four takes up about the cabinet space of two regular mugs, and the soft gray tint looks clean on an open shelf, especially mixed with the amber version if you collect both. Cleanup is a non-event since it's dishwasher safe. Hario means "King of Glass," and this mug is a nice everyday proof of the name.

Specs

• Capacity: 10 oz (300 ml)
• Width: 4.6" (117 mm); depth: 3.5" (90 mm); height: 2.75" (70 mm)
• Material: heat-resistant borosilicate glass, light gray
• Microwave and dishwasher safe
• Made in China