FreeSip Sip or swig. Because options. Sometimes you feel like sippin’ other times swiggin’. With both a built-in straw AND a wide-mouth opening, FreeSip lets you choose. A push-button, protective flip cap helps keep the drinking spout clean—which is always encouraged. FreeSip is also leak proof, easy to clean, and fit's in most cup holders. Yep. It checks all the right boxes.