For those that are particular about their type of coffee, the YETI Rambler 4oz Stackable Cups is the solution for enjoying that perfect espresso. The insulated stainless steel will keep everything piping hot throughout your morning. Espresso machine friendly, these Rambler cups can easily fit most at-home coffee appliances. Taste every drop of your single or double espresso in its purest form with the DuraSip™ ceramic lining. The stackable base makes it easy to store or pack up for travel