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Other income (Tables) | 12 Months Ended
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Dec. 31, 2025
Other Income and Expenses [Abstract] |
Schedule of other income | Schedule of other income
|  | Years Ended December 31, |
|  | 2023 |  |  | 2024 |  |  | 2025 |  |  | 2025 |
|  | S$ |  |  | S$ |  |  | S$ |  |  | US$ |
Government grants |  |  | 36,086 |  |  |  | 163,846 |  |  |  | 138,073 |  |  |  | 107,341 |
Cash /fund transfer rebates |  |  | 3,063 |  |  |  | 19 |  |  |  | 2,206 |  |  |  | 1,715 |
Interest income |  |  | - |  |  |  | - |  |  |  | 26,562 |  |  |  | 20,650 |
Usage of ISO13485 certified facilities |  |  | - |  |  |  | 10,000 |  |  |  | 67,614 |  |  |  | 52,565 |
|  |  | 39,149 |  |  |  | 173,865 |  |  |  | 234,455 |  |  |  | 182,271 |

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- Definition Other Expense [Table Text Block] + References No definition available. + Details
Name: | CUPR_OtherExpenseTableTextBlock
Namespace Prefix: | CUPR_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_OtherIncomeAndExpensesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration