GRAV Gravitron 2.0 Large - Upgraded All-Glass Gravity Bong Length|8.5" but it also offers the

but it also offers the added benefit of water filtration

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GRAV Gravitron 2.0 Large - Upgraded All-Glass Gravity Bong Length|8.5" but it also offers theThe world's first all glass gravity bong got a facelift. This new and improved version 2. 0 Gravitron boasts a fivefold increase in glass thickness and upgraded platinum cured silicone grommet for a tighter seal. The 19 mm female ground joint now fits any 19 mm male bowl and the flange at the top of the neck makes lifting the bottle a breeze. The Gravitron creates big, efficient hits through gravity and pressure. Start by filling the base halfway with