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I would not use it. SAJ14SAJ's answer goes into the physical properties of glass, but I would have a wholly different problem: it would not be steaming. For steaming, you want the 100 degrees hot steam to rise to the food and condense on it. But if you put the food in a bowl (which is closed from the bottom), this can't happen. You will have the vegetables ...

Note: I am assuming this glass is kitchenware, like mixing bowls or measuring cups, not service ware like drinking glasses or teacups. Glass melts at about 1500 F / 800 C. There is no danger of melting the glass in any type of steamer, or realistically with any equipment you may have at home. The real issue is thermal shock: very rapidly cooling glass ...