Weight of an empty tasbot 30ml 100mg bottle

Hey guys, trying to work out how much oil i have left, and I usually tare and weigh an empty bottle. Thing is, this is a first for the tasbot 100mg thc oil for me, so i have no empty bottle to tare, so if anyone has an empty bottle could they weigh it and me know so i can guesstimate how much i have left Many thanks legends