hygienic packet [SEP] i love these are individually packaged so every time you open it is fresh and very hygienicone packet have generous amount of serum in it and you can use not only for your face but also your neckand hand or you can use one packet in the morning and at night i would say one packet is for times use instead of onceit is gel watery feeling serum and not oily or sticky at all which i loveit makes my skin very hydrate calm and it does not bother even if you wear makeup afterwardsoverall i really love this serum and recommend