These water feeders come in a variety of sizes depending on the size of your colony/set up. They have a capacity of 5-40 ml, which can provide enough water for ants for a long time. The ants don't have a risk of drowning as this particular design works by water surface tension. For water feeding, 5ml can be used for 7-15 days or longer.
Ramp design at the entrance, large arched back, 2.5mm head width ants can also probe to eat the liquid inside.
Can also be used with honey water (please make sure you don't leave sugar water for to long as it will ferment)