Whats your problem with using the oven bro??
As you probably know......sterilisation is a process that usually requires heat.It could be either dry.......or steam.(You can also "cold sterilize".....but that method doesnt apply to oils,just solid objects.)I`ll check wether cold sterilising a vial will also sterilise the product inside.....but i dont think it will.Also......in the industry i work in ....we use soluble sterilising tablets...........look into it
If you are talking about the finnished product(oils) and not your vials/equipment .,,,,the only ways i know of to avoid using the oven would be to steam......(but you "may?"get some moisture in the vials),or to microwave.....(but i dont know how long for or at what temp........or wether it will degrade the hormone)
If you have the cash......you could just buy yourself a steriliser....or autoclave.......but its big bucks.
hope this gives you stuff to look into.