These silicone sleeves for quart mason jars add grip and padding, and they also insulate. These fit both regular and wide mouth jar. I often use a quart jar for drinking water, but they can be a little unwieldy. The grippy silicone wrapper makes it feel much more secure in my hand.
 
FDA food grade silicone rubber is dishwasher, freezer, and microwave safe! Silicone is a safe, extremely durable, non-plastic (BPA free) material for food use that does not leach any chemicals.
 
*Colors may vary*