Salonserve Professional Beauty Products
The above link is where i got mine from click on products the barbicide. £5.96 plus vat and delivery they have good nail art stuff on there too, dont bother with glass nail files they are c##p. have a brouse not bad prices for a lot of stuff. I dont use any of the enhancement stuff though.
I used to have two plain old glass jars that i leave in my boot (which was basically a mini salon set up to hold and protect my stuff).. when i was done with the client i drop it in one marked USED... and take from the one marked clean if i needed anything else.. worked for me.. The less i had to lug in the better!
A good tip for mobile techs is to grab a couple of the acordian style wine bottle holders.. made from wood they are colapsable.. you can lay them on their side in the boot and they hold jars.. containers etc.. if you use tape they dont move and stop your stuff rolling around!