The large (240ml) HEVEA baby glass bottles come in a two pack, with non-toxic natural rubber nipples (Size 3-24 months for milk and water) and have a well crafted screw thread and leak proof dust cover to avoid spills in your bag.\n\nThe glass does not react with the content of the bottles, so no substances will get into the food.\n\nAfter you’ve cleaned the bottle once, the milk will not taste or smell of previous content. HEVEA’s bottles are made from pure borosilicate glass, which is both heat and thermal shock resistant.