Introducing our first ever gravity bong. It functions just like one you would make from a plastic bottle. But it looks super cute, lasts forever & is perfect for your next sesh with friends This bong features our custom "how high will you get" indicator print. As you pull up the inner bottle, a hot pink ring moves up each level to indicate how high you will get Made of durable borosilicate glass Both outer and inner glass pieces have a silicone attachment at the bottom to prevent breaking Includes 18mm male bowl 13" tall Canna Style logo on backside Clean the inside like any other glass piece, such as isopropyl alcohol or 420 cleaner, clean exterior with mild soap Intended for tobacco use only