Since the OP is using an eGo Spinner, he will likely want a slimmer tank. I believe the pyrex cartotanks offer a better long-term solution than the polycarbonate-tubed tanks. You have the benefit of never needing to worry about what flavors of juice you use which might crack or melt a plastic tank. Plus, I feel they give a more elegant look to your setup.
As mentioned above, the slimmer 19mm IBTanks are a high quality and economical value fit for an eGo battery.
IBTanked - Get Tanked With Us!
View attachment 204395 IBTanked on an eGo Spinner.
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Phiniac has begun offering the Skinny Phinny. This is another high quality pyrex tank with a slim profile for a little more money.
The Skinny Phinny - Phiniac Glass