After Chris Gronkowski made his pitch, complete with a fun game of flip cup with his brothers against the Sharks, he found himself in the middle of a bidding war between all five Sharks, including guest Shark Alex Rodriguez. After some deliberation, Gronkowski accepted an offer from Mark Cuban and Rodriguez: $150,000 for a 15% stake, according to the official Ice Shaker site.
Since Gronkowski appeared on "Shark Tank" in 2017, the Ice Shaker made $3 million in sales in less than a year, which is just a slight increase from its $80,000 in sales in its first six months, per CNBC. The Ice Shaker has since been produced into 140 different bottles between a variety of colors and sizes and is also sold in all Lifetime Fitness and The Vitamin Shoppe locations along with over 3,500 GNC stores (via the official Ice Shaker site). In an update from 2018, Rodriguez popped back in on "Shark Tank" and also said the Ice Shaker was up 500%.
Gronkowski's brother, Rob Gronkowski, seemingly wanted to get in on the Ice Shaker action and bought out Rodriguez's stock in the company, and has since created his own line of "Gronk"-themed Ice Shaker bottles. Sounds like the Ice Shaker turned out to be yet another "Shark Tank" success story.