I am inspired by an image from a recent question here. I couldn't figure out how to model (Maybe texture) the look and feel of sharp glass edges around a spherical shape and SubSurf.
A quick example
Then just add a glass material https://www.youtube.com/watch?v=yRRN7yzPNQI btw your glass should look way better if u follow the tutorial i just added the material without doing anything to it in the photo below
Also if u dont want to use cycles u can just turn down the transparency (alpha) as ive done here https://sketchfab.com/models/177e494fdada4b64b02acf041ae8cfdd