Also a technical term for periodic variation in current or machinery (Xinhua sense 2). In everyday speech the drink has taken over — if someone says 'buy a 脉动' they mean the bottle, not their heartbeat.
Launched in China in 2003 by Danone, 脉动 became the market-leading vitamin drink by 2010. The name plays on the 'pulse' sense — marketed as restoring your rhythm after exertion. Ubiquitous in convenience stores alongside 尖叫 and 宝矿力水特.
