I have two favorite cups that I use everyday. I use a cup at night and another cup in the morning. Everyday its the same 2 cups. The cup I use at night is a tacky souvenir cup. Its so ugly! But it has a giant handle making it easy to handle in the middle of the night, its the right size holding 4 cups of water and is very lightweight. Its just enough water to get me through the night and I don't have to refill.
My morning cup holds hot tea. Its bigger than most coffee cups and holds the exact amount of tea that I want to drink in the morning. It to is the perfect size, weight, has a nice design and keeps my tea hot.
Since I use these 2 cups I don't need to use so many other glasses, cups or mugs. I have a preference. Knowing what you really like helps you make decisions about what you want to keep and what you want to get rid of when organizing. Remind yourself about your favorite things when you are being enticed by shopping for the latest and greatest.