1. Name: You can engrave your own name or two words in the name.

2. Inspirational short sentences: You can choose some short sentences that represent courage, belief or philosophy of life, such as "Sail against the current, if you don't advance, you will retreat", "Wild geese fly first, and then chase after them", "Know yourself and know yourself, unite and struggle, and forge ahead with heavy burdens" to motivate yourself to keep moving forward.

3. Motto: You can engrave a famous saying or motto you like, such as "Take a child's spear and attack the shield", "Seize the opportunity and get what you want" and "Say goodbye for three days and be impressed".

4. Commemorative significance: you can carve important dates or events, such as wedding anniversary and birthday. You can also engrave two people's names and acquaintance dates to record each other's emotional history.

5. Humor: You can carve some humorous words or short sentences, such as "Water falls red lotus, only smells jade sound", "May everything be fine in your world" and "After happiness, only sadness remains" to increase the fun of using water cups.

You can choose the appropriate lettering content according to your personal preference and use.