4OZ or 8OZ.REPLACEMENT GLASS INSERT. MAKE YOUR SELECTION This glass inserts are removable and interchangeable. They come with the convenience of plug for storage.

Yes, They can be used in standard bottle warmers. The glass insertswith plugs make excellent storage containers for pumped milk, premixed formulas and home made baby food when baby is done using their bottles. The usage of these bottle grow with your baby needs making them eco-friendly!

Includes silicone plug

Easy to read oz/ml measurement lines (8oz/240ml, 4oz/120ml)

Removable and interchangeable

Microwavable and dishwasher safe