Doctor Bee 300ml Pyrex Glass Mugs 100% Handmade Double-wall Cups with handle for Coffee Juice Water Milk Set of 2 (blue)

Description

About Tianyuan Glass:Huailai Tianyuan Special Type Glass Co.,Ltd. was established on October 9th, 2002,which is the national high technology Enterprise specializes in the research and development, production and sales of colored borosilicate 3.3 glass tubing and rods.The registered capital is 36.8 million yuan, Total assets exceed 450 million yuan. Presently we have more than 8 hundreds employees.Welcome business customer contact us and visit the factory.Features:Material:ISO approved High borosilicate glassBearing temperature: -20℃ to 150 ℃ （-4 ℉ to 302 ℉ ）Capacity:**10oz,about 300mlThe double wall is made of mouth-blown borosilicate glass known for its amazing insulating qualitiesb without burning fingers and  messy condensation, making them the ideal vessels for every beverage.Please note:Please don't put double wall mug into microwave oven.If broken within half a year(not due to human error),please contact us for new or refund.Compared to ordinary glass, borosilicate glass is superior to the former in terms of thermal properties, optical properties, mechanical properties and chemical properties, and has a lower thermal expansion coefficient than ordinary glass.And also has a high thermal shock and surface hardness whitch can prevent scratches, and can be applied to fire-proof, bullet-proof glass.Some customers receive the product, they will think why it is so thin and light, if the quality is terrible?In fact, normally,borosilicate glass products are thinner than ordinary glass products. This is just its feature, but never mind, it is more resistant to low temperature and high temperature. Kettle and cup products can be taken out from the refrigerator and poured directly into hot boiling water without breaking.Please trust the borosilicate.