Hello Emily, Per the manufacturer, these hot cups are recyclable, but their poly lining prevents their being compostable. If you are looking for the compostable version of these cups, see Tundra SKU 57284 (Karat KE-K512). Those cups have a plant-based lining in place of the poly lining, which enables commercial composting. Thank you for your question and if you would like any further assistance regarding these products, one of our excellent customer service representatives would be more than happy to assist you at 800-447-4941.
They are not guaranteed to fit securely.
Yes, Karat paper hot cups are recyclable.