This type of product that as a professional I have used for over thirty years is a must: no gas, no battery, 100% renewable energy. The first thing to check on a pear, this is the adjustment of the spout. This one is particularly well adjusted: no danger of projecting it on your or your optical sensor! We must take a pear in the palm of the hand and push hard and not between the thumb and forefinger: probably the bp of the person who has experienced difficulties in its handling. The beak is uniquely designed to have a very punctual air jet. The material and shape of the latter does not scratch a filter. Only regret: butyl rubber smells. This is not, of course, for food or medical use but I would have preferred silicone. The smell fades, however, after a few weeks. The delivery model is slightly different from the picture: instead for a big enough hand!