The 12oz. Kaldi Silicone Collapsible Coffee Mug is a great product for those who love outdoor activities such as hiking and camping or need a high-quality mug for their day-to-day activities like going to the gym or a morning commute. The collapsible silicone construction of this mug packs down to a fraction of its full size, making it super easy and convenient to pack or toss into your bag. Food grade silicone is used for the mug walls to make sure your coffee or tea always tastes fresh and remains corrosion free.