If the sample is scarce, 2ml snap top hplc vial can be used with micro-insert. 2ML Snap Top HPLC Vials for THERMO FISHER 1.5ml snap vial, 32 x 11.6mm, amber glass, first level of hydrolysis, wide opening, label and bayonet*100pcs, 1.5ml ring vial, 32x 11.6mm, amber glass, made of type 1 glass, wide Mouth, with label,