I have the Grav Upline upright bubbler. I love it! My only complaint is the hole you draw through is a little small, probably on purpose for the Venturi effect to cool it a little as it goes into your mouth. So it sounds like you’re sucking on a straw to an empty cup when you clear it, but other than that, it rocks. Besides it, I love my little cheapo hand blown one from the head shop, too.
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