Can the Be Bodywise Hair Serum Roll-On be refilled with another serum?

Hey guys!

Does anyone know if the Be Bodywise Hair Roll-On can be opened and refilled with another serum? I really like the applicator and was thinking of getting it just for that, but I don’t want to waste money if it can’t actually be opened or reused.

Can it be opened ?? Has anyone tried removing the top or refilling it? Would love to know before I buy it!