Make sure you practice being able to everything without setting the cup down just in case your in a situation where that isnt possible.
I always set the sample cup down when I need to zip up, etc. In many instances, Ive had to set the cup on the floor! But anytime I need to set the cup down, I always grab several sheets of toilet paper and fabricate a "coaster" to set the cup on. This serves to cut down on temperature drop which occurs when a warmed container is set on a colder surface. :thumbsup: