The Kupper - Make Single serve pack for the Keurig K-Cup Brewer coffee without an Automatic Brewer The Kupper is perfect for the home, office, when traveling, or camping too! The Kupper stores in the cupboard, not on your counter when not in use. Each box includes one Kupper, instructions and adapter for use with your refillable Cafe Cup. Made in the USA from 100% BPA-free plastic and is top-rack dishwasher-safe. It works with mugs up to 4 in diameter.