Since Emma managed to lose my Fox bait elastic, I've suffered from the lazzy slipping back though the hole in the top of the standard containers. Today I fitted a removable fly screen to the patio doors and there was some self-adhesive velcro left over. I cut a 1 cm x 2 cm strip from it and stuck it to my bait elastic container and now it stays where I want it, on the outside of the tube.