I found these snails in a few old blades of grass. They wanted to get to the top, no idea what they want there, on the top of old grass.
These are White-lipped snails; please have a look to the coloring of the shells. Some are without banding or with different numbers of bands. There was a discussion of the origin in the differences of the colors; one suggestion was an evolutionary selection by bird hunting but there are different colors in all populations. Now it is known that it is genetic and the association is a natural mixed bunch with many different individuals.