Our glass is made of high borosilicate glass which instant temperature difference is -30°C-150°, there is no need to worry about bursting due to overheating. Safety Instructions 1. The instant bearing of temperature difference is: -30° C~150° C 2. Suggested to clean the teapot with neutrality detergent when using first time. Advantage: 1. The products are made by borosilicate glass with low-expanding coefficient 3.3. 2. All material passes testing of LFGB & FDA &SGS 3. Strictly tested by QC system, every piece of the product looks perfect and excellent in quality. Brand new in original box Please check images for designs and prices DM for more information on any design. Pickup/Delivery available all over GTA, Contact 4372454159 Do check out instagram for more deals: https://www.instagram.com/thrift._.thrill?igsh=OTR5bWlkY3BkZnJl
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