⚠️ Not for any ❌1-Hole Keurig machines or 5-hole ❌K-CREMA. 🔔Install the original pod holder before brewing. Hot brewing works perfectly; cold-brew on K-Brew + Chill not supported. 100% BPA FREE. ☕Refillable K CUP filters are very easy to use, just fill the coffee powder you need into the pod, after using, just dump the grounds into the trash and wash the reusable K CUP filter by running water.