About this 3D model
Updated model with 2 more mounting holes at the bottom for added stability. Printed in PETG on pruta mini+. May need supports under opening at bottom. Modeled in Tinkercad. Modeled after about 3 poop bags at max 135x60x55mm in size each. Simply drag the bags out of the bottom when needed. When first roll is empty next one will fall to the bottom.