Most people thoroughly chill such wines, but experiment with what you like. For example, I prefer dessert wines slightly cooler than dry white wines. Glasses I've sipped wine from paper, plastic, ceramic, and glass, and all of these were better than not sipping. Given a choice, however, any wine drinker would prefer glass. But wine glasses come in all kinds of colors, shapes and sizes.
Clear glasses are better than tinted glasses.
Second, glasses should curve slightly inward toward the top. This traps more of the aroma of the wine. It also helps less coordinated people like myself keep the wine in the glass when swirling. I wouldn't lose sleep over this. After all, wine judges use the same glasses for both white and red wines when evaluating them at competitions.