Hand blown glasses Food Safe material(Borosilicate Glass, Silicone, Plastic) Extra thermal shock resistance - all our glass containers are made from borosilicate glass, which has a superior thermal shock resistance. It can handle sudden temperature The insulating sleeve can protect hands from hot/cold Control brew tea time by yourself

Hand blown glasses Food Safe material(Borosilicate Glass, Silicone, Plastic) Extra thermal shock resistance - all our glass containers are made from borosilicate glass, which has a superior thermal shock resistance. It can handle sudden temperature The insulating sleeve can protect hands from hot/cold Control brew tea time by yourself