I have a bar and it's great. I thought it was a bit pricey but they do the job, I keep them in the freezer and if anyone orders a beer tower I'll throw one. The beer stays cold all the time when they bring back the empty beer tower, the chill stick is still good. and cold. Putting this in a tower will displace beer so you end up making money. I think they are talking about 8 ounces. A 100 ounce beer tower will give you one free for every 12 towers you sell.