If you are on a budget, your best bet is this J.Crew Tank. It's a great product, while not very costly. Another good option is this Forever 21 Tank. While the price is not very high, be sure that this item will become a wonderful addition to your wardrobe. You may also want to look at this Alexander Wang Tank. This item is not expensive either, but it will make a difference in your wardrobe.
If you can afford to spend a little more, you're in luck with this Lanvin Tank in stock and waiting for you. You are bound to fall in love with this item.
If you're on a hunt for a luxury item, then you won't be disappointed if you check out this Polo Ralph Lauren Tank. It's an expensive but smart option.