#1 Please buy disposable vape from your trust people.
Nover get the cheap one, you will get what you pay.
#2 Check the certifications of the product.
Each safe disposables are fully CLP, MHRA & TPD compliant and are manufactured under the strictest conditions, to food grade standards, in at least ISO Class 8 cleanroom.
Every batch of safe disposables e-liquid should undergoes meticulous GC-MS testing to ensure that it is entirely safe for consumption.
And check above certification mark on the package box.