The PortaVia rubber lid fits inside any standard mug or cup, making it spill-proof and safe to be taken out the door with you! It's unique because it creates a seal inside your personal mug or cup. Since coffee and tea are best enjoyed in ceramic or glass mugs you will never have to compromise on taste. Help reduce the amount of disposable cups in the world by using what you already have and love.
The most direct and painless way to reduce the billions of disposable cups that go into landfills is to begin to use what we have in a new way. PortaV ...