NBA executive vice president Stu Jackson phoned Butler on Tuesday and told him to leave his straws at home.
His Mavericks teammates, including Dirk Nowitzki, poked fun at their teammate by chewing straws during warmups earlier this week.
Instead of drinking Mountain Dew, he found chewing straws to be a better addiction:
"I was going through withdrawals," Butler said on NBA.com. "... Honestly, those first two weeks without The Dew [were] the roughest two weeks of my life. I'm talking headaches, sweats and everything."