Camping pour over coffee brewer with stainless steel mesh filter is BPA-free; EU-food grade silicone rubber and stainless steel are long lasting and easy to clean Super-fine stainless steel mesh to hold in grounds but let the good oils through Low-profile fold-flat design for packability Filter unit holds one serving (approx 30g) of ground coffee Mount base fits most mug and wide-mouth bottle rims; Sea to Summit Guarantee is offered for the Lifetime of this product The Frontier Ultralight Collapsible Pour Over folds flat for storage in its polypropylene mount base, then pops out when needed to make a perfect pour-over brew. The easy-to-clean stainless steel mesh filter is sized just right for one serving (approx. 30g) of ground coffee and formed to hold the grounds but filter the coffee oils for a rich, satisfying cup of coffee. The mount base fits most mugs and wide-mouth bottle rims, and the EU food-grade silicone rubber and stainless steel filter unit slides inside the base for easy transport. It even stows nicely in a Frontier Collapsible Kettle.