The last and most important question is how much are you willing to spend on this bong?
Quality glass bongs can be found at any price range, so if you want cheap glass bong, a general advice would be to value durability and functionality over style and accessories.
What environment are you bringing your glass bong into?
Buying a big bong or a technical bong requires a lot of caution. Big bongs tend to fall and break more often, wheatear from the clumsiness of its users, or from the fact that they take up more space and just get in the way. You would be wise to have a special storage place if you do decide to purchase a large bong. But don’t think that glass bongs are frail in any way. They can be very sturdy and survive their fair share of falls. Just not 10-foot ones.
Technical bongs come with a lot of accessories. Be sure to purchase a case to store all the various parts, unless you want them becoming forever lost in the gaping pit that is your couch.
If you like to keep your bong smoking ways a private matter, away from other house members, small glass bong would probably be a good way to go. Something you can put in your drawer at least.
There you have it. All the basic info you’ll need if you’re new to the world of glass bongs. So if you’re buying a bong remember to know exactly what you’re looking for, remember what every good bong should have, and keep in mind that there’s a good glass bong to be found at any price range.