I’ve used a plastic ammo can. They have a seal and are water tight. Can fit about 20-30 cigars. You can get them for about $12 or less, sometimes free with ammo purchase.
Does it have foam inside so they aren't just rattling around?
Looking at the inside dimensions, its nor really much bigger than the pardo i ordered except 2" in Length. If they have padding, thats definitely a good deal