“Botticelli” boxes with separate lid are made from Duralong Wave archival micro corrugated board, ideal for long term horizontal storage. The sturdy box style, with double walls on all sides and triple board lawyer on the base and the lid, avoids any distortion and makes the box particularly suitable for storing heavyweight artefacts even in multiple stacks. Easy to assemble thanks to the extra board on the base and the lid that blocks the double walls and is simply fixed with a small square of acid-fre double sided tape.