I am having trouble losing small specimens while washing and changing solutions in 1.8 ml cryo tubes (after high pressure freezing). Does anyone know of something to help keep the samples at the bottom of the tube while changing solutions? A screen to keep them trapped in the bottom, or maybe a small chamber or box that would fit in a tube or scintillation vial? I have looked at the mPrep system, and while I am looking for something that works like the mPrep capsules, we don't have the budget for the whole system. Anyone know of a cheaper alternative to keep samples from getting lost?