Swig Life Slingi Crossbody Cooler. The NEW Slingi Crossbody Cooler is the best companion for any lunch date, tailgate, or packed picnic. Use Slingi's adjustable, cushioned strap to carry itcomfortably over the shoulder or across the body. Unzip the wide access top to fill up to 3 bottles of wine or 8 cans, plus ice.