Monachoides incarnatus is a very common hygromiid living in forests. Although it is very common, it does not go away from its forest to open land. It is easily recognizable for its reddish apertural margin and for example also for its typical microsculpture of shell (that is partly visible on the first photo).
I have taken this one to home and it is feeding on a piece of cucumber. It seems, that cucumber is the best food source for many snails. But I do not know, if it is only for large amount of water in cucumber (that may be more crucial in artificial conditions than in nature) or for the structure of this food or if it is somehow tasteful for snails.