The 12oz Kid's Grip-N-Gulp has side indents that are easy for tiny hands to grasp. The cup, lid, and removable sipper valve can all be removed for easy cleaning. Lid loop can be clipped to backpack, diaper bag or stroller. Cup is compatible with OTG, ATB & wide-mouth closures. Indestructible, translucent, odor, stain & residue resistant. Sustain bottles are made with material derived from 50% plastic waste (using ISCC certified mass balance). Each bottle is created from resin powered by next generation recycling technology that transforms plastic destined for landfills into high-performance bottles.