Small ant trap for liquid bait (eg borax/sugar), 40mm diameter. 

PLA and no supports required. 0.3mm first layer for easy ant on-boarding.
 

V2 base has a simple round well for liquid bait inside.
 

V3 has extra channels for the liquid bait, useful to drag the bait out along the channels to get faster ant engagement :)

Tops should be pretty much snap fit.

Solid top helps prevent any accidental access.
Holy top has 10mm hole for easy refilling of liquid bait.