I was one of the original Kickstarter backers of this guy. My first couple of bottles worked out ok, then I had about 10 bottles shatter in my hand, in a row. Haven't touched it since.
ApathyMonkthis was a kickstarter?
i had one when i was a kid. not the same brand of course.
but like you i had several bottles shatter, one of which cut my thumb knuckle, still have the scar 20 years later.
ApathyMonkI've used a variety of things to cut and drill glass over the years, it's a fickle thing some breaks are inevitable. Making sure your line is spot on and being patient with the hot/cold water helps a lot. Also thicker glass like wine bottles take longer but tend to work better than beer bottles in my experience (though I've cut quite a few beer bottles successfully there is a higher failure rate). Very much a practice makes perf... err... better thing 😉
Cut proof gloves (or just decent leather work gloves) will prevent most injuries.