If you're a thrifty spender, your best bet is this Stateside Tank. It's a popular product, while not very pricey. You can also check out this Monrow Tank. It's a product you're bound to love which also doesn't cost the earth. You might also want to consider this Vince Tank. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you want to treat yourself, then you absolutely must check out this Jean Paul Gaultier Tank. This product seems costly, but it's well worth it. Another product we're drooling over is this Vera Wang Tank. It's pricey but you get what you pay for. And one more item you might be interested in is this Rag and Bone Tank. 'Cause you deserve nothing but all the finer things!