Glass bongs are surprisingly durable, and they don't get burn marks. You can use the same glass bong for years without experiencing any inconvenience when maintained correctly. High-Quality Glass Bongs

Stoned, I. M. (2009). Weed: 420 Things You Didn't Know (or Remember) about Cannabis. Avon, Massachusetts: Adams Media. pp. 24–25. ISBN 978-1-4405-0349-8. A regular bong is typically made of borosilicate glass or another heat-resistant material and can be easily stored on a shelf and used multiple times. A gravity bong is usually made out of a plastic bottle and can only typically be used for a single smoking session. Both bongs and gravity bongs contain water, however, which is a method used to cool the smoke before it enters the lungs of the user. Panshin, A.J.; de Zeeuw, Carl (1980). Textbook of Wood Technology: Structure, Identification, Properties, and Uses of the Commercial Woods of the United States and Canada (McGraw-Hill series in forest resources) (4th ed.). New York City: McGraw-Hill. p. 32. ISBN 9780070484412.

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It also looks just like any other glass bottle, meaning this gravity bong is also one of the more discreet pieces, allowing you to display it on a shelf in your living room when it isn’t in use. Conclusion A gravity bong functions like a regular one, but the one significant difference is that a grav bong has two bottles to hold bong water, not only for filtration but also to create a vacuum and draw the smoke for a huge hit. Internationally, the sale of gravity bongs is often prohibited in countries where marijuana is illegal due to its association with the herb. [ citation needed] In the United States, under the Federal Drug Paraphernalia Statute, which is part of the Controlled Substances Act, it is illegal to sell, transport through the mail, [17] transport across state lines, import, or export drug paraphernalia, meaning that the bong is illegal. [18] [19] Since California, Colorado, Washington, and several other states have legalized recreational use of the herb, gravity bongs (along with other related paraphernalia) can be legally sold to anyone over the age of 21. [20] [21] In countries and states where use of cannabis is illegal, some retailers insist that bongs are intended for use with tobacco in an attempt to circumvent laws against selling drug paraphernalia. While technically the term "bong" does not mean a device used for smoking mainly marijuana, drug-related connotations have been formed with the word itself (partly due to punning with Sanskrit bhangah, meaning "hemp"). Thus for fear of the law some head shops will not serve customers who use the word "bong" or "bongs", typically insisting instead on the term "water pipe". [13] See also edit

Making your own waterfall bong is simple, and similar to making a Gravity bong from scratch. Here’s how to make your own waterfall bong. Here’s what you need to build a waterfall bong from scratch. Once filled, you remove the bowl, put your mouth over the mouthpiece, and push the upper section down to let gravity, air, and water pressure propel the smoke into your lungs. Can Gravity Bongs Really Be Safe? Albright, Troy; Shawkat, Nedal; Susor, Alex (Fall 2005). "Contraband: The Sale of Regulated Goods on the Internet". Georgia State University. Archived from the original on 2016-04-12 . Retrieved 2011-05-24.Delahunty, Brendan; Putt, Judy. "http://www.ndlerf.gov.au/pub/Monograph_15.pdf" (2006), Monograph Series No. 15. National Drug Law Enforcement Research Fund. National Drug Strategy. See United States v. Angelos, 433 F.3d 738 ( 10th Cir. 2006) (55 years for three sales of marijuana). You’ll need to take into consideration the size of your desired bong and how it’s going to fit into your lifestyle. Larger bongs tend to be more expensive as well as being bulkier, making them better suited for use within the home. They also deliver bigger hits making them suitable for more experienced smokers who are used to higher concentrations. Phillips, Gregory (2003). Addictions And Healing In Aboriginal Country. Canberra: Aboriginal Studies Press for the Australian Institute of Aboriginal and Torres Strait Islander Studies. p. 53. ISBN 978-0-85575-450-1.