Actually, the liquid does move if you tap the plug or something but since the plug is filled to the brim with the liquid, it doesn't slosh around when you move or walk. Hope that answers your question.
Most of the glass spiral plugs don't get made past 2 or 0 gauge because the get really heavy or fragile (depending on the design) past those sizes. Lol. If you really want them you might be able to wear them through earskins or something.
Thanx. That's why I made this one take so long. I want everyone to have a chance. I hate it when I see something awesome but don't have enough time to save up credits. xD