UltraFlask™ Speed 500ml
Vest Compatible Hydration
Part of our ultra-light series, the 500 ml is so light, you might forget you brought it. Weighing in at just over an ounce, it’s optimal hydration, no matter what kind of runner you are. Its pliable material conforms to most pockets, it shrinks as you drink to minimize water movement and it can be used with or without the tube. Topped with a new feature, the SpeedFill™ cap, makes aid station refills a breeze. Ultra light weight, ultra useful.
Soft material conforms to most hydration vests, belts, or pack pockets
Flexible design shrinks as you drink reducing water movement
Choose between a bite valve and a drink tube cap
Topped with a flip top cap for fast refills at aid stations
Blaster Bite Valve Sheath 2-Pack
Bite Valve Replacement
Replacing your bite valve from time to time helps maintain your hydration system. HydraPak's Bite Valve Sheaths provide a soft bite and are made of durable silicone. Perfect for chewers or to keep in your emergency gear kit with your bandaids and duct tape. Fits and replaces all HydraPak bite valves on our Reservoirs, SoftFlasks, and UltraFlasks.
*Please note - Blaster Sheaths DO NOT fit on the new Comet Bite valves and are not compatible with any of the new 2023 reservoirs. Please purchase Comet Bite Valve Sheaths HERE.
Locking Cap - 42mm
Soft Flask Replacement
This replacement cap features a high-flow bite valve which auto-seals after each sip and includes a twist locking cap for added security. Fits all HydraPak products with a 42mm opening including the SoftFlask 500ml hand held, Stash 750ml bottle, UltraFlasks, and Seeker water storage containers.
- A great hydration addition or replacement to your running vest, pack, or belt pocket
- Vest-pack fit provides bounce-free stability and a flexible flask shoulder to prevent chafing so you can focus on FKT's and PR's
- High-flow bite valve auto-seals after each sip, eliminating annoying drips
- Large standard 42mm opening lets you fill the UltraFlask easily with ice and drink mixes
- Customize your cap with two options depending on your run or vest, directly mount your bite valve or use the straw cap (4 in / 100 mm)
- Made of ultra-durable, abrasion resistant TPU & RF welded seams for superior durability and elasticity
- 100% BPA & PVC free, wide working temperature range (can be frozen - max temp 60° C / 140° F)
Capacity500 ml / 17 fl oz
Dimensions186mm x 58 mm / 7.3 x 2.3 in
Weight41 g / 1.4 oz
MaterialTPU, PP/POM, Silicone