Packable locking mug Fill it, lock it and pack it. This double wall insulated mug will keep your coffee hot for up to 1.5 hours or cold for a lot longer. Use the folding loop as a carrying handle or clip it outside a pack. Great stainless steel mug for those looking for a great double wall mug. Locking lid lets you pack with confidence 18/8 stainless steel won't rust; naturally BPA-free Double wall insulation keeps drinks hot or cold 1.5 hours Folding Loop extends for carrying or clipping to pack Dishwasher safe