Add an insulating cozy to GSI Outdoors Infinity impact-resistant polypropylene material, and you've got the GSI Outdoors Infinity Backpacker Mug. This BPA-free mug with sip lid will keep your beverages warm, and critters out.17 fl. oz. capacity..Size: 4.0" x 3.6" x 4.6"..Wt. 3.5 oz..