Still catching up here since was like 14 new pages but sip containers stand for Sub Irrigated Planters! Basically an internal reservoir u keep full and the soil wicks the moisture up! No worries with over or underwatering them!
Speaking of
@Tattoochase how much water do those hold in the rez? Just curious cuz I know the water only wicks up so far so just curious! My deeper square earthbox I used for peppers I noticed I had to topwater for a lot longer til they were big enough to get to the layer of soil the water will wick up to!