Coffee tables should be the same height as the surrounding seating with 18 inches being a good average (although it will depend on your furniture). If you select a coffee table with a lip make sure the lip isn’t higher than the adjacent seating or you’ll end up hitting your drink against the lip when you try to set it down. The idea is to put your drink down not up.
Don’t forget when styling a glass coffee table that it’s not just about what goes on top but also what goes below. A see-through table practically demands a graphic rug. Try a black-and-white rug and use similarly stark accents in differing shapes or leave the top completely undressed and let the rug be the star of the show.