Reusable devices contacting various foods through repeated cycles require migration assessment across simulants demonstrating consistent safety regardless of food type variability over device lifetime. Multiple-use overall migration in liquid simulants demonstrates migration stability through repeated exposure cycles across different simulant types. This comprehensive testing reveals whether migration increases due to material degradation from repeated food contact, decreases as mobile substances deplete through cumulative extraction, or maintains stability indicating well-controlled material performance. Critical for reusable devices with repeated food contact requiring safety demonstration across device lifetime, validating that cleaning procedures between uses don't alter migration characteristics through surface modification, and demonstrating that safety margins remain adequate throughout intended reuse cycles. For reusable medical nutrition equipment, testing across simulants validates performance with various enteral feed compositions from aqueous to fatty formulations, repeated exposure and cleaning cycles don't compromise migration control through material changes, and initial high migration stabilizes to lower levels through extractable depletion. The multi-simulant repeated testing approach reveals simulant-specific migration behavior identifying whether certain food types cause enhanced extraction, enables comparison across simulants determining worst-case conditions, and supports use recommendations specifying compatible food types when migration varies significantly. Manufacturing validation for reusable devices confirms formulations provide acceptable migration across all relevant simulants throughout design life, processing achieves migration levels maintaining compliance even after repeated extractions, and validation studies demonstrate safety under conditions representing actual clinical use patterns.