Rob Gronkowski helps his brother make a deal with A-Rod and Mark Cuban on 'Shark Tank'

Nick Paschal
·Supervising Producer, Yahoo Entertainment

The testosterone level was at an all-time high when Rob Gronkowski and his brothers brothers visited Shark Tank. Chris Gronkowski was there to pitch his double-walled, vacuum-insulated, stainless steel shaker bottle — Ice Shaker. But just one Gronk bro wasn’t enough. “Bros!” Chris yelled before his four bigger brothers, including the New England Patriots’ star tight end, came running out to join him.

Wherever the Gronk boys go, the party is sure to follow. So what better way to pitch your product than a good ol’-fashioned game of flip cup? The five Gronk brothers took on the five Sharks in a fun game of flip cup, which the Gronk brothers, obviously, won.

With the fun and games out of the way, it was time for Chris to reel in a shark. But they all had one question — why the heck isn’t the Gronkowski name on the product? Laurie Greiner even suggested they name it Gronk Shaker. Chris explained that he didn’t want people just buying the product because of the name, he wanted people to buy it because it’s a good product.

Guest Shark Alex Rodriguez wasn’t too concerned with the name and teamed up with Mark Cuban to make the Gronk bro an offer. After offering $150,000 for 20 percent of the company, Chris countered with $150,000 for 15 percent. Cuban and A-Rod immediately took the offer, and all the guys celebrated the three-sport partnership. Rob yelled out, “Football, basketball, and baseball, baby!” as they shook on the deal.

Shark Tank airs Sundays at 9 p.m. on ABC. Watch clips and full episodes of Shark Tank for free on Yahoo View.

Watch: Richard Branson throw water at Mark Cuban after he calls entrepreneur a ‘gold digger’:

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