What would you use to make a lot of tea in?

The company I work for has a 2nd business and they will start selling Bubble Tea. They asked me to do some research to find a large kettle or pot to boil the water and make the tea in. I was wondering what would you suggest to use for something like that. I normal tea pot will not cut it. I am looking for something rather large but cost efficient. I was thinking some kind of large bowl type thing lol….Maybe you guys have some suggestions…