These silicone sleeves for Wide Mouth Half Pint (8oz) jars (short and wide, kind of bowl shaped) add grip and padding, and they also insulate. Use them for baby food, coffee cups, condiment cups, oatmeal, snacks, or anything else. Whether you call it a Koozie, a Kozie, a Coozy, a Cozy, or just an insulating sleeve, it’s perfect for protecting your glass jar from breakage and your hand from cold or heat. Made of 100% silicone rubber, these sleeves are dishwasher, freezer, and microwave safe! Silicone is a safe, green, non-plastic (BPA free) material for food use that does not leach any chemicals. Multi Purpose - Juice, espresso, yogurt, or crackers - whatever you're sipping or snacking, they're all tastier from Mason jar! Up your coffee bar with a sugar dispenser lid and pour and store lid (for the half & half, of course)! Or add a leak proof lid and bring lunch to work or store bulk snacks in easy to go portions in the pantry. My kids use the little silicone dish to store treasures.