Tornado Duo

Tornado Duo is made of borosilicate glass. There is no special treatment or coating. The glass is borosilicate glass.

Borosilicate glass is a type of glass that contains boron trioxide which allows for a very low coefficient of thermal expansion. This means it will not crack under extreme temperature changes like regular glass (i.e. Pyrex is made from borosilicate glass).

Borosilicate glass is also lead and BPA-free, making it perfectly food-safe.

Yes. We do recommend hand washing but if you need to use the dishwasher then place the Tornado Duo on the top rack only.

No, although this is the case with other double walled glass brewers, the Tornado Duo is the first of its kind. 

The temperature in most dishwashers is simply not high enough to cause this to happen with the Tornado Duo. The glass would need to be heated to 300 Celsius, then there can be expansion, enough to push out the silicone seal. Regular DishWashing machines are usually 95 to 100 Celsius.

Brewista utilizes a Purified Water Washing Process that uses 130-135 Celsius High Temperature Heat to Dry which allows us to QC each unit ahead of time to check the seal.

All that being said, although the Tornado Duo is “dishwasher safe” it’s not recommended to use the dishwasher for cleaning.

DO NOT PUT THE TORNADO DUO IN THE MICROWAVE!

The gold band is a special type of “foil” and is not microwave safe.

Orders for the Tornado Duo are fulfilled by Brewista. If you have questions about shipping, please refer to the Brewista Shipping and Returns FAQ.

Orders for the Tornado Duo are fulfilled by Brewista. If you have questions about returns, please refer to the Brewista Shipping and Returns FAQ.