Pick: carbon-lined hard case with a built-in combination lock

Start here. This is the pick for most buyers. The lid closes on a rubber or foam gasket. The gasket blocks air movement. A carbon layer inside holds odor. The lock sits in the lid, so nothing dangles. Interior volume runs from about 0.5 L for a grinder and one jar to 5 L for four jars and tools.

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Lock type matters. A 3-dial lock gives 1,000 codes. A 4-dial lock gives 10,000 codes. Both stop a casual search by a child or a guest. Neither stops an adult with tools and time. Brands in this group include Herb Guard, Stashlogix, and Skunk. Models change each year. Read the listing for lock type, interior volume, and seal material before you buy.

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Option 2: Pelican-style hard case plus a padlock

Pelican 1450, Nanuk 915, and Harbor Freight Apache 4800 have two padlock holes in the lid. They seal to IP67 and survive drops and water. The stock case does not block odor. Add an activated carbon pouch or a carbon insert. Use a padlock with a shackle under 5/16 in. A 4-dial combination padlock gives 10,000 codes and no key to lose. Price: $30 to $120 by size.

Wooden vs Metal Stash Box: Which One Should You Buy First?

Option 3: steel lock box

Vaultz and Stack-On make steel boxes with a key lock or a 3-dial combination lock. Price runs $20 to $40. Steel holds its shape and fits a drawer or a shelf. Steel does not seal. Odor passes through the hinge gap. Put flower in a glass jar or a carbon-lined bag inside the box. Buy one size up from what you think you need.

wooden vs metal stash box

Option 4: lockable carbon bag

Skunk and Cloudten sell bags with a carbon lining and a small combination lock. They fold flat and fit a backpack. The zipper is the weak point. Odor leaks at the zipper teeth. Bags hold 1 oz to 1 lb of flower plus tools. Price: $30 to $80.

What the lock does and does not do

Locks keep children and visitors out. The CDC tells households to store cannabis in a locked place, out of reach of children and pets. The CPSC sets the child-resistant packaging test in 16 CFR 1700.20. A stash box does not replace a child-resistant container. Use both. Federal law lists cannabis as Schedule I. That does not change what box you buy. It changes what crosses state lines. Keep the box at home.

No federal standard covers the word "fireproof." UL 72 is the test standard for fire resistance of record protection equipment. A low-cost box with that word on the label may carry no rating. Check the label.

Size guide

Bottom line

Buy the carbon-lined hard case with an integrated lock first. Add a Pelican-style case when water or drops matter. Add a steel lock box when the budget is under $40. Add a lockable bag when the box travels with you.