The phrase "glass cup" is correct and usable in written English.
You can use it to describe a cup made of glass material, often in contexts related to drinkware or kitchen items.
Example: "I prefer to drink my coffee from a glass cup because it allows me to see the rich color of the brew."
Alternatives: "glass mug" or "transparent cup."
He lifted the glass cup to his lips.
One of the exhibition's oldest objects, a glass cup from the treasury of St. Mark's cathedral, has a multiethnic pedigree.
The egg, now cracked and odorous, stands in a small glass cup, covered by a glass dome to contain the smell.
He found a marble head of Salome, a glass cup, three pottery lamps, a bronze foot, several Roman war medals and many gold necklaces.
As he and five others made a run for it, someone knocked a glass cup, shattering it and catching Monis' attention.
The silver-colored stackable plates come with a spike on which a clear, faceted plastic glass, cup or bowl can fit securely.
RAMADI, Iraq — Meeting various neighbors and supplicants on a recent evening, America's staunchest ally in Iraq, Sheik Ahmed Abu Risha, sat in a tent sipping tea from an implausibly tiny glass cup.
One evening, her husband at the time came home with a small glass cup he had created in an art class that Ms. Rhodes had encouraged him to take.
His subjects are antique vessels (a silvered glass cup, a brass coffeepot, several ceramic and enamelled pitchers) all showing signs of use, most seen in splendid isolation; they can be read as modest self-portraits.
(The sauce will separate if it becomes too hot). Transfer the sauce to a small thermos or to a glass cup set inside a bowl of very warm water.
To avoid loss of any cell during the washing process, the washing solution was passed through a glass cup filtration system including a filter of 0.22 μm pore-size.
