The parties quickly agreed to start a test with 100,000 containers.
Production of these containers was completed by 1 July 1989, and they
went into immediate use. The government contributed one-third of the
cost of the containers. During the autumn and winter of 1989–90,
the College of Agriculture undertook an economic study and evaluated
the pilot project in terms of modifications in the system and the design
of containers. The pilot project worked out so well that retailers decided
to use the containers even before the College of Agriculture had
completed their evaluation. The use of containers kept increasing,
although at this stage the system operated essentially without any
rules. By 1 July 1990, however, the parties involved had drafted rules
for how the Kisten-Pool should work