No way to replace the glass. There's a taper that will prevent you putting on the new one. It's possible I guess, with a 16mm glass with silicone ends, it could work but it'll look like shit and hold .5ml
Edit: Get yourself some of these
SKU 4201000, ID is 18mm so it'll stay on. Just have to scrape the silly logos off
Edited on 5/8/2016 at 7:23 AM. Reason: