You can choose from:
Pipete - 0,5 ml plastic pipette for placing liguids inside the arena and for moistening the nest.
Tweezers - help with food manipulation and arena cleaning.
Test tube - 15 x 100 glass test tube for your new queens. Also serves as a water reservoir in the arena.
Syringe - for experienced ant keepers this can be an easier way to moisten the nest. However, be careful, the syringe comes with sharp needle!