I just did a review
http://www.e-cigarette-forum.com/fo...-valley-view-tanks-7ml-pyrex-tank-review.html of these tanks here.
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I 've been using two 7 ml clear pyrex tanks from this vendor. These are a very affordable way to obtain a pyrex glass tank. They do what they were designed to do, which is hold your eliquid without leaking or falling off of your mod accidentally. They also are safe for using any of the liquids known to destroy clear plastic tank materials. Their only downside is that they are grommet tanks (use no end caps) and must be filled by inserting a blunt needle between the silicone grommet and the carto. End caps are one of the major expenses of a tank system, so going with these large grommets saves you some money.
Having filled my tanks a couple of times now, I have a couple of suggestions. Insert the needle from the bottom of the tank. Then, should you tear the fragile silicone a little it won't be as noticable from the bottom of the tank between it and the mod.
Also, pushing the needle into the tank tends to push that section of the grommet further into the tank. Using a blunt dental tool from the drug store, inserted just like the needle, you can "tease" the silicone back to the way it was. The grommets likely will eventually get some tears in them regardless how careful you are, so have some extras in reserve. They are dirt cheap from the vendor.
