These clear Ayu bags from Tackle In Japan can also be used as a viewing tank. Japanese Ayu anglers normally use these to carry decoy Ayu.
The bag has small drainage holes so you can put it in the water to refresh the water in the tank without the fish escaping.
Holds about 1.2 litres of water below the drainage holes.
The bag will fold down and easily fit into a large pocket or pouch.
Dimensions: 10.0 x 10.6 inches (255 x 267 mm)
Material: Polyethylene, nylon
Carry handle.
"With the Yamanami viewing tanks out of stock at the moment I started searching for other 'soft' viewing tanks when I stumbled upon these. Whilst not as sturdy as the Yamanami tanks, these will easily fold and fit into a pocket making them a perfect standby viewing tank. I haven't been fishing with one yet to test them out but will be soon!" -Max