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This is a pretty good deal for a bubbler attachment, although might not apply to all slickdealers. Got this in email today.
The coupon code is MDW2015
The item can be found here
http://www.sourcevapes
All you need is an ecig battery (can find on ebay for ~$ 5). These bubblers usually go for $ 30 on the SOURCE site, and other brands I have seen selling the same thing for $ 40-$ 59.
I have their orb attachment which also is on sale for 40% off, but I have not yet gotten this bubbler, but going to try it out. Always been happy with source and they have good customer service.