If you're a thrifty shopper, you'll appreciate this Wildfox Couture Tank. It's a popular choice and a good investment. Another strong contender for your wardrobe is this Forever 21 Tank. While the price of this product is not very high, it will definitely attract a lot of attention. Or you can choose this Chaser Tank - be sure you'll be making a stylish addition to your wardrobe.
If you can afford it, then what you're looking for is this Marni Tank. It's more expensive but worth your money. While you're at it, also have a look at this Courreges Tank. Yes, this item is expensive, but it does not mean it's not worth it.