No the boxes are how the mushrooms you buy in stores are supplied, they weigh about 4 kg per box.
The kits you are perhaps thinking about are available from various businesses, some are worth it money wise others only from the personal satisfaction side. While I’m sure there are many more the following are just some of the suppliers for you to look at.
As to puffery, it is quite prevalent in the Ad industry. Some of the allowed claims I find quite atrocious and I feel strongly puffery should be not allowed. There is a topic on the site about it:
