Non-Toxic The cup is made of high Borosilicate Glass, a stainless steel cap, FDA proofed natural leak proof cap ring. BPA and PVC free, does not contain any toxic substances.Prevent burns Bottom of the cup has thickened to help its firmness, tightness, and its heat resistance.Thickened bottom The bottom of the cup's thickness is five times of the regular cups, more heat resistance, more firmness.What shall I do if there is smell?It is caused by silica gel Sleeve, it will be gone in air. Or you could soak it in hot water then dry it, the odor will go away.
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