一个顶两个 英语怎么说

One who is better than another two.

你要说产品，那就是One which we product now can do the same work as another two productions before: 一包的数量就可以顶(我们以前做的）两包来用。

One which we product can do the same work as two productions which another product ：一包的数量就可以顶(其他人做的）两包来用

不知道你要表达哪个意思？

One pack can last as long as two packs.

one earns you two
one serves as two

Examples:
One package of high-quality product earns you another package.
One package of high-quality product serves as two packages.