Inspect glass before each use
Check the entire surface and base under good light.
Look closely at the rim and edges
Rotate the piece in good light and inspect the tip, widest point, neck and base. Set it aside if you find a chip, crack, sharp edge or other damage. Ask the maker about replacement after a drop.
Check the exact material and finish
The word glass doesn’t specify its composition. Look for a clear manufacturer description. Keep a record of the model and instructions so you can verify what applies to it.