The On-The-Fly lid as a separate part — which is also the cheapest way to turn a plain 32 oz Nalgene you already own into a one-handed drinking bottle. Nalgene describes it as a lock-top that opens easily for one-hand refreshment and locks to prevent spills. The colorways are two-tone: lid and button.

How it ships: this is the bulk-packed version — the lid itself, without a retail card or hang-tag. Same part, less packaging, which is the way we would rather sell a spare anyway.

What it fits

Nalgene’s own description: “fits 12, 24, & 32 oz Wide Mouth Bottles.” We are quoting that line specifically because Nalgene’s page gives three different answers — a separate compatibility field drops the 12 oz, and the page metadata claims “all wide mouth bottles.” All three of their own statements leave out the 48 oz wide mouth, even though their plain 63 mm cap does list it. So we are not going to tell you this fits a 48 oz Silo. Ask us and we will confirm with the supplier before you order one for that bottle.

And as always: not the 16 oz wide mouth, which is 53 mm.

Specifications

• Cap thread 63 mm
• Lock-top, one-handed operation
• Materials polypropylene, silicone and TPE
• Weight 1.6 oz (45.25 g)
• Dishwasher safe
• Made in China

No separate gasket. Nalgene does not sell the silicone seal out of this cap as a part — the cap is the replacement unit.