Our 9 year old cat stopped eating voluntarily at the beginning of the year. All of his tests come back negative for everything, but he still won't eat. We were using many, many 10ml syringes until we found these. We give him 40ml's per meal so it all fits in 1 syringe and the nice big catheter tip makes it very easy to draw the food in and squirt it into his mouth. We put them in the dishwasher to sterilize them but we don't use the heated dry cycle. When they come out we do put Vaseline on the rubber ring to keep it from deteriorating. I love Life Line and I am very glad we found this site and these syringes.