This is one of the tubs that I use to hold babies until they are ready to be sold. I used these almost exclusively as grow out tubs until I built all of my racks.
These are 90qt Sterilite tubs with 1/2" x 1/2" hardware cloth tops/hoppers. The hardware cloth is secured to the top of the tub with plastic zip ties. The hoppers are built using j-clips. I use mini-bungies to hold the top on the tub. I think the tub costs less than $20 to build including the water bottle.
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