After having been in the soil for the right amount of time you can try to have them live out their second life-cycle in the vase for the duration of the blooming period.
Please keep in mind that our growers use a complicated process over the course of weeks to prepare the bulbs so they can thrive hydroponically. When it comes to putting the bulbs back in the vase during the season, we cannot guarantee success.
The bulbs are alive and sensitive to abrupt changes in their environment, switching them over to another is a delicate process.
Before attempting to force spring flowering bulbs for hydroponic growth yourself, it is recommended to let the bulbs recover in soil, since they're depleted from having bloomed once.
Please find the instructions to let the bulbs recover in soil here: https://bloomaker.zendesk.com/hc/en-us/articles/360049071871-What-should-I-do-after-my-hyacinths-are-done-flowering-