We love our glass bottles for a lot of reasons, but for us the most important reason is hands down, that the water tastes great! It just tastes better then plastic, or metal, both of which can and often do change the taste of the water and when you think about why and how that is, it can be scary, chemicals/lead leaching into your water.
The technical reasons for such a clean taste: the glass is made from high strength borosilicate glass and contains no lead or cadmium. The lids are made from thermoplastic elastomer (TPE) to seal against spilling and contains no PVC, BPA or phthalates. The bottles have a Scandinavian design and purposefully have no lips/edges where bacteria could accumulate and both bottle and lid are dishwasher safe.
Additionally and why it took years to find a reusable glass water bottle that we felt good about, these are designed and made in Europe and are the only bottle we could find that guarantees they are made by people earning a living wage and in a safe environment.
We could go on and on about the various social and environmental benefits of these bottles, but great taste, environmentally friendly and humane manufacturing practices are at least the top three.