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Glass Vials with Storage Plastic Tray for Freeze-Dried Peptide Powder. Premium transparent borosilicate glass, clear & durable. Airtight rubber stopper + aluminum flip cap, leak-proof. Diverse cap colors for easy identification. Compatible with freeze-dried powder, serum, raw peptide samples. Optional plastic storage tray packaging. Support OEM customization: printing, size adjustment. Widely used in cosmetics, biological research & laboratory sampling.