There is nothing better than spending some quality time relaxing and chatting with your sister while sipping out of personalized Sister coffee mugs. Every sister would love having matching customized mugs to remember past memories. These mugs are dishwasher safe & include FREE Personalization! Personalize your Mug choice with up to 6 sisters' names. Mugs are available in different sizes ranging from 11 ounces to 20 ounces.