[Diana in Wisconsin]

They’re talking ‘commercial’ so probably just Industrial Brewed Tea.

Rumor has it that you can make your own tea bags from coffee filters, but that’ll be NEXT week’s Health Scare:

https://letsdrinktea.com/diy-teabags/

OR - just buy loose tea and use a stainless ball brewer to brew a cuppa:

https://www.seriouseats.com/best-tea-infusers-7500581

[Bikkuri]

I brew my tea in a coffeemaker with a strainer as a filter.