It's hard to choose between coffee and oatmeal when you only have enough boiled water for one. You could just boil more water, or you can go with coffee and pour your coffee into the oatmeal. Either way, you're using the GSI Outdoors Glacier Stainless Sierra Cup. This classic cup is great for coffee, oatmeal, or both. Its stainless steel construction is ruggedly rustproof, and the retractable handle folds flat for convenient storage.