Just wondering, do different tanks really affect flavour etc.? I would have thought that as it's coming out of the cartomizer the shell wouldn't matter. If it does I'm in as I'm using pretty cheap plastic tanks at the moment.
It's not much of a difference between using plastic vs pyrex vs stainless steel tanks. However, just as people prefer different drip tip materials, people will prefer using one over the other for different reasons.
Plastic will be less expensive and you'll be able to see the juice easily. Some people can taste the plastic, most can't. Also, some flavors can etch, crack, or melt the plastic and ruin the tank.
Something Safe for Cinnamon & Citrus Flavors. Inexpensive plastic tanks in general are a lesser quality tank with poorer quality end caps & o-rings.
All-
metal tanks can be used and are an option if using the above tank cracking flavors. They are extremely durable. However you won't be able to see how much juice you have in your tank to know when to refill it.
Pyrex tanks appear to be the most popular and most common. With glass being an inert material, it will not impart any additional taste to the e-liquid like a plastic tank might. You also can easily see the juice level, and is safe to use with the tank cracker flavors. Pyrex tanks are as a general rule a higher quality tank with better o-rings and better machined end caps. Definitely worth the investment for the higher cost.
There's a reason that restaurants use glass drinking utensils rather than metal or plastic....they look and taste better.