Dany,
Contact the reps if you don't get a response online.  I have seen it written
that the personal kits are for personal use only and not to "share".  Medela,
I believe, now has an autoclave unit for sale?  I saw it when I browsed a
recent Rental Roundup issue.  Don't know if this would be suitable to
sterilize these kits.
Laurie Wheeler