Pringles tube Tunnels.
These are nice and wide and even a plump syrian fits through.
Eat a tube of Pringles (hard I know!) then cut off the bottom metal disc using sharp scissors. Use a cloth and water to clean the inside of the tube of any pringles dust and flavouring. Dry well and allow your hamsters to have fun running through the tunnel
The plastic lid makes a nice low dish as well for porridge or babyfood as well as fruit and veg