Transitioning from bottle drinking to open cup drinking can be a messy business. Our easy-drink straw cups allow your baby to develop grown-up drinking skills without the messy spills. Featuring our unique INTELLIVALVE anti-leak technology, this straw cup is leak-proof even when it is turned upside down or shaken. Tommee Tippee straw cups feature a soft, flip-down drinking straw made with BACSHIELD antimicrobial technology that reduces microbes by up to 99.9%. BACSHIELD is a commonly used silver-ion technology that provides antimicrobial product protection against unwanted microbes, recognized for centuries with no harmful effects.