Tea in the Garden.
I have a wonderful deep-sided tray with a convenient handle over the top. This enables me to carry three mugs of tea, spoons, saucers and a milk jug, with a plate of cakes balanced on top - into the garden safely and without spillage. It only needs one hand, the other being occupied with a crutch.
Everyone who sees it says "What a splendid idea !"
This incredibly useful and extremely versatile gadget is inexpensive and widely available in your nearest hardware store or supermarket; it is more commonly known as - a bucket.