Thermo Scientific™ Nalgene™ LDPE Sample Vials with. Store samples securely in Thermo Scientific™ Nalgene™ LDPE Sample Vials with Closure, which have a friction-fit, snap closure and will not shatter like glass or polystyrene vials. Straight sided vials allow easy access for filling and emptying. Friction fit closures are completely removable and snap in place for convenient vial access.