IT UNSCREWS AT BOTH ENDS
Cap and base both thread off. On a tube this small that is what makes it practical: you can load it from either end, empty it completely, and actually clean the inside rather than rinsing and hoping.
$63.50 away from free US shipping
4.8 out of 5 from 21 verified reviews.
This is the smallest sealed tube ONGROK makes.
Anodized aircraft-grade aluminum, an O-ring seal, and a keyring built into the cap, at $11.50 in five colors. It is the one you carry without thinking about it.

Cap and base both thread off. On a tube this small that is what makes it practical: you can load it from either end, empty it completely, and actually clean the inside rather than rinsing and hoping.
Short enough to sit flat against your keys instead of hanging off them. If you have carried a keychain tube that swings and catches on a pocket, this is the one that does not.
The cap threads down onto a rubber O-ring, so it seals under compression rather than friction. On a stash keychain that is what keeps it shut in a bag full of other things.
Small enough to sit in the pockets and webbing of ONGROK's carbon-lined wallets, cases and pouches, so it works as the rigid container inside a soft-sided bag.
Opaque, and it holds its shape on a keyring. Plain finish, no branding.
Pink, Gold, Silver, Black and Green. Premium quality, without the premium price tag.
The Aluminum Storage Keychain is the larger tube at $14.99, with two spare O-rings. Both are in storage keychains.
At ONGROK, our goal is to "ENHANCE YOUR EXPERIENCE", by bringing you the best products possible. If you're ever dissatisfied, just reach out and we'll be certain to make things right!
Picked to go with this one. Ships in the same order.