Wrist Water Bottle for Running – Hands-Free 7 oz Soft Silicone Flask with Strap

A seven-ounce soft flask that straps flat to the back of your wrist, so a sip is a lift of the arm

This is a small squeezable silicone flask, about the size of your palm, curved so it sits flat over the top of the wrist on a black hook-and-loop strap. Unscrew the grey cap to fill it, pull the bite valve up, and drink by lifting your wrist and giving the flask a squeeze. Your hands stay free for the handlebar, the trekking pole or your stride, and there is no bottle to hold, no belt and no pack.

What it actually is

• A soft flask, not a rigid bottle. The body is soft, translucent silicone, so it squeezes to push water out and flexes with your wrist. The maker lists the body as silicone and the cap as polypropylene; an earlier version of this page called the whole thing polypropylene, which is only true of the cap.
• Seven fluid ounces. The capacity is moulded into the body: 200 mL, which is 7 fl oz, or a little less than a small glass of water. That is a top-up between fountains on a run or a ride, not a long-distance supply.
• Bite-valve spout on a screw cap. The grey ribbed cap unscrews for filling. On top of it is a short frosted pull valve: pull it up to drink, push it down to close. Squeeze the flask rather than sucking hard, and it flows easily.
• Curved to the wrist. The underside is shaped to the top of the wrist so the flask lies flat instead of rolling. It rides where a watch would sit, on either arm.
• One strap, one size. A black hook-and-loop fabric strap threads through a loop on the base of the flask and wraps the wrist. It is a short strap sized for the wrist, not the forearm; see the fit note below.
• Three colours. White, Black and Pink. The Pink is a soft peach-pink, as the photograph shows, not a bright pink.

Wearing it

The specification, as the maker states it

Good to know

• It is a top-up, not a canteen. Seven ounces covers a few sips per mile on a short run, a ride between fountains, or a walk. For long runs and hot days it is the thing you carry as well as, not instead of, a bigger supply.
• The strap is short. It is sized for a wrist. Reviews of this design on other marketplaces include a buyer with a large build who found the band too short. If your wrist is on the big side, expect a snug fit, and know that the strap is a standard hook-and-loop band that can be swapped for a longer one.
• Keep the valve down when you are not drinking. The valve seals when pushed down and the cap screws tight; like any soft flask, it will weep if the valve is left up and the flask gets squeezed against your body.
• Not insulated. Water sitting on your wrist in the sun warms up. Fill it cold and drink it early.
• Sports drinks are fine, but rinse. Sugary drinks leave a film in the valve; rinse it through with clean water after.

In the box

• One soft wrist flask in your chosen colour, with the cap and bite valve fitted
• One black hook-and-loop strap, fitted through the flask base