"I have a glass in my hand."
Tłumaczenie:Mam szklankę w mojej ręce.
Can you please be a bit more specific? By "szkło", do you mean a shard of glass from a broken drinking glass (szklanka)? Is that what you meant by it being about health, or did you mean something else? When I say "I have a glass in my hand." I imagine an actual drinking glass, something like this: https://www.crateandbarrel.com/dining-and-entertaining/drinking-glasses-tumblers/1