I made a custom liquid at Mt Baker with cola and rootbeer mixed and it was really good BUT I can't get the taste out. I've washed and soaked everything and changed the head but it's still there. I have a cheapy vaporizer with a plastic tank and from what I've read some flavors just make themselves at home in the plastic tanks. I really love rootbeer so it's not the end of the world, I'm just glad it wasn't some nasty flavor I hate.
Gonna upgrade very, very soon to a nice mod and a couple PT2's so hopefully this won't be an issue after that.
You may not be able to get the flavor out. Cola and Rootbeer are both "tank cracker" flavors. That means there is an ingredient that has a chemical reaction with the plastic. You may notice that your tank looks a little foggy or hazy. (These flavors do not necessarily crack your tank straight away as the name sounds as it would) Common tank crackers are cola, rootbeer, cinnamon, citrus, cherry.
On the Mt Baker site, if you check the product description on your flavor choices - watch for this:
Product Description
Our 100% USA made Nicotine juice comes in a variety of blends and strengths. Please select the options to complete your juice order. The Cola e juice is made with the highest quality flavors and ingredients and will satisfy your taste buds and nicotine cravings. All our e liquids come in 15 ml childproof dropper bottles. The Cola E Juice is freshly mixed when you order so you will never get any old product from us. In order to add the item to your cart you will need to select all of the options. All our e juices ship out within 24 hours of order time. Most of the time sooner. If you have any questions, comments, or concerns please send us a email via our contact page.
Warning: This flavor has been reported to damage plastic tanks.