Avoid hard plastics and square edges/sharp corners. Notice that the basket from the article has rounded edges, and rounded cutouts. The plastic appears to be t

Avoid hard plastics and square edges/sharp corners. Notice that the basket from the article has rounded edges, and rounded cutouts. The plastic appears to be thickish and should be very slightly flexible/rubbery (bending because the material is flexible, not merely because it is thin). These products should (and definitely can) last decades.