This is my favorite way to travel with oil. I can weigh the oil in the syringe and know it is safe being bounced around in a bag. The idea to put the syringe in a toothbrush holder came to me a long time ago, however, finding a holder that fit the syringe was no easy task! I finally found this one at Bed Bath & Beyond. Here are a few pictures of my system which has worked out wonderfully while on the road!
You have to put the plunger end into the shorter end of the holder, otherwise it will not close completely.
All safe and snug!