Kambukka’s 300 ml travel mugs, including the Olympus and Etna, are specifically designed to fit under most standard coffee machines. Their compact shape and fully leak‑proof design allow you to enjoy your coffee‑to‑go straight from the machine without spills or hassle. Looking for a travel mug that fits under a coffee machine, a leak‑proof insulated 300 ml mug, or a practical everyday coffee & tea mug? Olympus and Etna combine convenience with excellent heat retention.