Egg-crated

No need for heat-shrink sleeves; egg-crated cavities in the housing give you the insulation you need.

Source: wiktionary

Third, the fingerlike projections of the convoluted egg-crated foams are more subject to damage than the flat surface of conventional pads.

Source: wiktionary

The fluorescent lighting at this deepest part of the plan is not entirely effective because the egg-crated strips tend to dazzle and to make the crucial bookstock section feel dark in comparison.

Source: wiktionary

Some were Shaker oval boxes with lapped fingers tacked into place; some were dovetailed candle boxes; some were boxes bandsawn from solid blocks of wood; and some were jewelry boxes with egg-crated interiors.

Source: wiktionary