✅ Non-toxic material, safe and healthy to use. ✅ Leak-proof double zipper, self-standing bottom design, more secure to prevent milk spill. ✅ Conveneint and reduce waste, The left and right corners are set to easily cut the size angle, which can control the flow rate of the pouring, without secondary pollution. ✅ All breast milk bags have been medically graded with gamma disinfection. Can be direclty used, do not need to clean again. ✅ Safe to use the bottle warmer to heat up, but suggest to use in microwave or boil.