Get Glass Baby Bottle Heat Sensing Healthy+ 240 ml Blueberry. Now you no longer have to worry about the contents of the baby bottle being too hot! Everyday Baby Heat Sensing Baby Bottle Healthy + indicates when the contents are too hot for your child. Above 40°C, it changes the color to white. Made... Read more
Discover the baby bottle that makes life easier for parents! With a Swedish patent-pending design and several innovative features, this bottle is developed with a focus on comfort and safety. Color-changing heat indicator: The silicone sleeve changes to transparent when the temperature rises abov... Read more
Here’s another one!
https://everydaybaby.com/products/glass-baby-bottle-healthy-heat-sensing-240-ml?
They already exist!