CyanSunLids
How to Choose a Paper Cup Lid
Lids fail for one reason: they are matched to the ounce number instead of the rim. Match the diameter, choose the drink opening, then test with the real cup.
Match the rim
| Rim | Typical cup | Common lid |
|---|---|---|
| 80 mm | 8 oz hot | Flat or sip |
| 90 mm | 12–20 oz hot | Flat, sip, dome |
| 98 mm | 16–32 oz cold | Flat, dome, straw |
| 105 mm | 24 oz soup | Vented flat |
Two factories can both call a cup “90 mm” and have different rim profiles. Always request a lid fit sample with the cup order.
Material and opening
PS is clear and cheap; PP handles heat better; PLA is compostable but brittle in the cold; paper lids avoid plastic at a higher cost. Sip lids for coffee, straw slots for cold drinks, domes for whipped drinks.
Frequently Asked Questions
Will a 90 mm lid fit any 90 mm cup?
No — rim profile and curl thickness differ. Test the actual pair.
Which lid for hot coffee?
Sip or flat in PP/PS; paper if you need plastic-free.
Are lids recyclable?
PS/PP lids are recyclable where accepted; remove them from the cup first.
Need the numbers for your own cup?
Open the cup size calculator →