SoftFlask™ Cap - 28mm

Name: SoftFlask™ Cap - 28mm
Brand: HydraPak
SKU: WHP-P218
Price: 3.96 USD
Availability: InStock
Rating: 5.0 (5 reviews)

$3.96 $6 In stock

Category: Replacement Parts

The HydraPak SoftFlask Cap is a replacement cap designed for HydraPak SoftFlasks with a 28mm opening. It features a soft bite valve for drinking on the move.

Fits HydraPak SoftFlasks with a 28mm opening
Soft bite valve
Replacement part
Brand: HydraPak
Suitable for running and trail running use

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Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Violet ★★★★★ Oct 18, 2026

Finally got a replacement cap that actually seals properly without leaking in my pack. The bite valve opens smoothly with just a light pinch, making hydration effortless on long runs.

Jacob M. ★★★★★ Oct 14, 2026

The bite valve on this one is way easier to drink from while running than the old hard cap I had. Snapped right onto my 28mm flask with no leaks so far.

Elizabeth K. ★★★★★ Oct 13, 2026

Replaced the lost cap on my 28mm flask and it threaded on perfectly, no leaks in my pack. The soft bite valve takes barely any pressure to get water flowing, which is exactly what I wanted on long trail runs.