So 50 years ago, about 1970, they came up with cheaper single use glass to replace the stronger returnable. In all that intervening time, there has been a lot of research into glass to make it tougher for things like cell phone screens. Re-directing / re-purposing some of that glass research toward better reusable glass containers would lead to reusables much better - tougher, longer lasting, lighter - than the ones of old; unfortunately probably considerably more expensive to produce as well but providing all the more reason to reuse. And if containers could be made in standardized shapes, sizes, and openings that would simplify the cleaning processes and necessary caps for the containers.