If the object is something other than water, you can buy some water based matte varnish and spray the object with it. Test it first to see if it is going to discolor or harm the object. And if it's edible, you probably wouldn't want to eat it afterwards!
Also, if you diffuse your lights, you should cut down a lot of the glare. If you're working inside, try placing something thin and white between your object and light. |