Enjoy your favorite drink - hot or cold - in this stacking mug from Puebco. Crafted from premium borosilicate glass, it is resistant to extreme temperatures and more durable than standard glassware. The "shallow" version has a small, rounded handle, the "deep" version has an angular handle and both have a tiered design which makes them easily stackable to save space when storing in your cupboards. Area: China Shallow Stacking No.302201 Size: H 4 in. x W 4 in. x D 3 in. Deep Stacking No.302218 Size: H 3.5 in. x W 4 in. x D 3 in. Material: Borosilicate Glass (Heat-resistant)