No - they do not fit
NC301 pints do not fit the NC501 Deluxe. NC301 uses the 16 oz XSKPLID2CD family, while NC501 uses the 24 oz XSKPNTLD2 XL Deluxe family. SharkNinja's Original-pint page explicitly says its pint does not fit the NC500 series.
Compatibility ledger
OFFICIAL RECORDS| Item or model | Compatible system | Verdict | Research note |
|---|---|---|---|
| NC301 machine | XSKPLID2CD / 16 oz Original pint family | Fits | NC301 is named on the official 16 oz compatible-model list. |
| NC501 machine | XSKPNTLD2 / 24 oz XL Deluxe tub family | Fits | NC501 is named on the official 24 oz compatible-model list. |
| NC301 pint in NC501 | None | Does not fit | The manufacturer explicitly excludes NC500-series machines from the Original pint family. |
| NC501 tub in NC301 | None | Does not fit | The Deluxe tub is a larger, model-specific accessory system. |
Why the names cause mistakes
Both products are marketed as Ninja CREAMi containers, and many sellers use 'pint' loosely for both. The core model number and official part number are more reliable than the shared product-family name.
The two-number check
For NC301, look for 16 oz and XSKPLID2CD. For NC501, look for 24 oz XL Deluxe and XSKPNTLD2. If a listing combines both claims, inspect its exact compatible-model list before buying.
What about third-party adapters?
This guide does not recommend using adapters or altered containers. It records the manufacturer's intended fit systems and does not extend them based on marketplace claims.
PRIMARY SOURCES