Contact or visit the factory to get samples of their products before you make a final decision. Once you get the sample, be keen on the quality of the product. Find out if there is a complete system that checks on quality and whether their quality standards are top-notch. If you cannot offer them your e-juice, be focused on the e-juice sampled for you, therefore you need to have a taste to find out whether you like it.

If the vape ecig manufacturer is not keen on the samples offered to their customers, you won't expect them to do anything better in the next step of the partnership.

https://ecigator.com/