I'm not sure if this has been covered or not in the other large zample box threads but I figured it was worth discussing. I had noticed a blog by the owner on their site saying what we as vapers should avoid in our juice. Of course, the items listed where what we already know about (acetoin diacetyl acetyl propiony). In the blog it mentioned how we could vape without worry because zample box assures the liquids we get are of the best quality. I wrote them an email and asked what exactly that meant. What standards are they using, how do they assure us our juice is free of these items etc. I got a really great and friendly response from the head of research and development discussing the steps they take to select the liquids in our boxes. He said they constantly test liquids from each of their vendors for not only those substances but also to insure the nic level is accurate and check the alcohol levels of the liquid. He said they strive to offers juices with ZERO of the listed above no nos and any trace amounts are technically unreadable and fall within the margin of error for their test kits. I was really satisfied with his response and just thought id share in case this hasnt been addressed. Cant wait for my next box!