Taking pictures of glassware can be a burden if you are in a hurry. The surface of glass collects dust; smudges and fingerprints show up easily; blemishes can't always be hidden.
You have to clean glassware before photographing it. Then you have to try and find a background that won't distract from the transparent glass... some backgrounds can completely hide your subject. Then there is the lighting--which makes your glass beautiful but can destroy your image with reflections and glare. You cannot use a direct flash on glassware, and natural lighting is prefered... so you may have to use a tripod and polarizer.