Needed a quick and easy and portable kill jar, so this is a perfect solution. I ordered two — one for me and one for a friend who has no biology training and is interested in insect preservation. I was very pleased to see that the jar and vial of ethyl acetate came with a small rubber dropper and a little slip of paper with some simple instructions for beginners in addition to the detailed chemical data sheet. Haven’t used the jar yet but the seal seems good, and the plaster pour is neat and looks great. Definitely would buy again!