Lindsay Lohan just stared in a Pepsi commercial where she drinks Pepsi and milk TOGETHER! In the ad, Lindsay mixes her milk and Pepsi and she calls it 'Pilk'. Now TikTok users are also trying 'Pilk'! Insider’s Kieran Press-Reynolds says, Pilk has been around for a while, also known as “dirty soda” in the past and enjoying mainstream popularity in India and Pakistan as “doodh soda,” a drink made from mixing “various sodas with milk.”