Answer: Customized benefit
Explanation:
With a Customized Benefit plan, the company is able to pick which benefits to wants to offer it's employees. This enables them to even allow employees choose the set of benefits that makes the most sense for their individual needs thereby creating a personal flexible plan like in Celia's company.
The benefit of this is that your plan will not be full of products that are irrelevant to your health thereby giving the person more value for their money.