If you're in a thrifty mode, your best bet is this Forever 21 Tank. It's a fantastic product, while not very pricey. Another strong contender for your wardrobe is this Tank. While the price of this product is not very high, it will certainly 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're looking for an item in the middle of the price range, look no further than this 3.1 Phillip Lim Tank. This item doesn't cost a fortune, but absolutely deserves a spot in your wardrobe. It's also worth looking at this Etoile Isabel Marant Tank. This piece is ultra popular and, just as importantly, not too pricey.
If you're looking to purchase a designer item, 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.