Square Glass Milk Bottles (Airtight Lids)

Important note on baby bottles

Because baby bottles are often used with warm liquids such as breast milk or formula, heat, fat, and acidity can affect how materials behave over time. I pay close attention to the materials used in bottles and whether they are clearly disclosed. For feeding and storage, I prefer glass or clearly labeled, safer plastics because they’re more stable with repeated use.

What I avoid in baby bottles

In this category, I avoid PVC and PUR, as well as BPA and BPS. I’m also mindful of contaminants such as lead, which can sometimes appear in decorative paints, inks, or coatings. I look for simple designs, minimal exterior decoration, and clear material disclosure so I know what’s actually in contact with the milk.

Product description

These square glass bottles come as a set with airtight screw lids and a silicone dispenser top. They’re described as food-grade glass with clear capacity markings, making them easy to use for storing liquids such as breast milk or formula. The airtight lids are designed to help prevent leaks, and the square shape can be convenient for organizing in the fridge or freezer.

While marketed more broadly for beverages and storage, the materials—glass paired with silicone and plastic components—align with what I look for in a milk storage container.

Materials

Glass bottle body
Silicone dispenser lid
Plastic screw lids (food-grade, as stated by the brand)

What I like

I like that the primary bottle material is glass, which is stable for warm liquids and easy to clean thoroughly. The clear measurement markings make it easy to see how much liquid is inside, and the airtight lids are helpful for storage. The simple, undecorated design is also a plus for me.

Things to keep in mind

The plastic lids are food-grade, but I avoid putting them in the dishwasher repeatedly at high heat. Hand-washing the lids is a simple way to be gentler on the plastic and help them last longer.