User blog comment:Foxeth/Teamwork (Sapphire potion event)/@comment-39704184-20200206232908/@comment-31858346-20200207091504

The reason theres a minimum required amount (20) is so that there are no cases of people, who brought one potion, taking advantage of others who worked hard and spent time on gathering 2⁰. Nobody will stop you if you want to give more, however the minimum requirement is set in stone.