I had been using a large bottle that I got from them back when they were 5150 and now that I’m trying to lose weight again it was time for some more to replace my energy drinks. I put it in LaCroix or other sparkling waters and it’s just as effective and waaaayyy better for you. Customer service is fantastic. I had an issue with my shipment and emailed them. They took care of it first thing on the next business day, it was Saturday when I emailed. They gave me zero hassle and went beyond my expectations to resolve the issue. I will use Liquid Caffeine without hesitation again and again.