If you're budget-restricted, your best bet is this Blank NYC Tank. It's a great product, while not very pricey. Another great option is this Max Studio Tank. While the price is not too high, be sure that this item will become a wonderful addition to your wardrobe. Or you can choose this Lucky Brand Tank - be sure you'll be making a stylish addition to your wardrobe.
For something in the middle of the price range, look no further than this Zadig & Voltaire Tank. This item doesn't cost the earth, but absolutely deserves a spot in your wardrobe.
If you're not a thrifty type, then you won't be disappointed if you check out this Carine Gilson Tank. It's an expensive but smart option. While you're at it, also have a look at this Dolce & Gabbana Tank. Yes, this item is expensive, but it does not mean it's not worth it.