If you can’t spend much, your best bet is this Everlane Tank. It's a wonderful item, while not very pricey. Another smart option is this Merritt Charles Tank. While the price is rather reasonable, be sure that this product will become a great addition to your wardrobe. You might also want to consider this AllSaints Tank. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you're a bargain shopper, look no further than this Raey Tank. This item doesn't cost too much, but absolutely deserves a spot in your wardrobe. It's also worth checking out this Joseph Tank. This piece is extremely popular and, just as importantly, not very expensive. Look at this Rag & Bone Tank too! Great value for your money.
If you want to splurge, then you absolutely must check out this Kacey Devlin Tank. This piece seems costly, but it's worth it. While you're at it, also have a look at this 3.1 Phillip Lim Tank. Yes, this item is expensive, but it does not mean it's not worth it. You might also want to consider this Theory Tank. You won't regret the money spent!