All of our propylene glycol is re-bottled from PG, that is USP Kosher certified. We sell our UPS PG in a variety of sizes. Our line is also great for those looking for wholesale propylene glycol. Our USP propylene glycol is completely pure and you simply won’t find lower prices online. Remember that all of our UPS PG’s qualify for our Rewards Program where you can earn 6% credit for future purchases. We also offer free shipping over $75 and speedy and reliable shipping on all orders. There is no reason not to shop at RTS Vapes for your e-liquid bases!