The main area I identified for improvement was in lifting and emptying contents from the vessel.
I realized the simplest solution would be allow users to hold the vessel itself, so I designed a protective, insulating layer to allow users to actually hold the vessel while pouring from it. I tested the heat resistance of silicone at various thicknesses by holding boiling pots of water and found that at 5mm thickness, virtually no heat is transmitted through the vessel to the hands.