One way out of the problem is not to use glass.
For a variety of both health and environmental reasons, why not use glass?
"Someone is using a pool or glass to try to see us?"
You can also protect your feet instead of using fake glass.
We use great big glasses, and never fill them more than half full.
The Romans were the first known to use glass for windows.
She had used glasses during the past few days, but was not completely comfortable with them.
She's the only character that uses glasses and is a cold person.
The type of glass used is dependent on the application.
But how did we happen to use glasses at the same time?