storing a 1.3GB cookie ?!

anyone care to explain why this site is taking 1.3Gb in one cookie, and what’s in there?

pls see screenshot chromium of site cookies:

not saving in my chrome browser ,and i use all parts of pimoroni site almost daily ,and i have cookies set to be saved

Yes in Chrome it seems that cookies are stored in a database, so all of my cookies for every site are only about 1MB.