Massdrop currently has a drop on a combo pack for two Derlin capsules manufactured by CountyComm. Derlin is a low-friction thermoplastic, and the capsules also feature a waterproof O-ring seal. The capsules come in two sizes; the larger capsule is sized for objects like spare ammo, paper, and emergency bandages; the smaller capsule can hold items like water tablets, or extra cord.
www.massdrop.com/buy/ultimate-delrin-safe-combo
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