Use sturdy boxes.
1	Use	use	VERB	VB	Mood=Imp|Person=2|VerbForm=Fin	0	root	0:root	Discourse=joint-other_m:16->7:2
2	sturdy	sturdy	ADJ	JJ	Degree=Pos	3	amod	3:amod	Entity=(17-object-new-cf1-2-sgl
3	boxes	box	NOUN	NNS	Number=Plur	1	obj	1:obj	Entity=17)|SpaceAfter=No
4	.	.	PUNCT	.	_	1	punct	1:punct	_
