You can find almost anything on Amazon. Although, now, Amazon has removed products that shoppers could use to make counterfeit marijuana vaping devices. In a statement from an Amazon spokesperson:

Amazon does not allow e-cigarettes or drug paraphernalia in our store and our policy has been in place for many years.

Two listings were brought to our attention and we quickly removed the listings.

The items that were pulled from Amazon mimicked the marijuana products that are sold legally in several states, the ones that have legalized recreational usage. The items are described as packaging materials for a specific brand of marijuana oil cartridges, to compliant stickers. According to MPR.com, those stickers indicate that the object the labels are attached to is legal under that state's marijuana law.

Anyone could order these items from Amazon, fill them with any vaping fluid they wanted, then, in turn, sell them on the black market, where marijuana has not been legalized for recreational usage.

Amazon — the world’s largest retailer — was selling an array of products one could use to manufacture a cartridge, from tamper-evident seals to warning labels to oils to packaging. That’s most everything, except for the THC oil itself.

A Minnesota man died after an extended hospitalization for a lung injury tied to vaping. He did have an underlying lung disease, however, his death was the first reported in the State of Minnesota that is associated with vaping.

I went looking for the regulations in Minnesota regarding E-Cigarettes and Vape Pens, and I found a lot of information on the Public Health Law Center site:

How does the state define an e-cigarette?

Electronic delivery device means “any product containing or delivering nicotine, lobelia, or any other substance intended for human consumption that can be used by a person to simulate smoking in the delivery of nicotine or any other substance through inhalation of vapor from the product. Electronic delivery device includes any component part of a product, whether or not marketed or sold separately.”

They are not legal for minors to purchase, use, or possess.

What restrictions are in place for retail or youth access?

Sale/distribution of electronic delivery devices prohibited to persons under age 18.
Minn. Stat. §§ 609.685(1)(a), (2)(a) (2019)

Purchase/possession/use of electronic delivery device by person under age 18 prohibited.
Minn. Stat. §§ 609.685(2)(b), (3) (2019)

Sources: MPR.org, Public Health Law Center