Test strips can be chucked into a normal household bin at home or out, they aren't classed as clinical waste, this is also the same for the multi-click lancet drums, never can cause a finger stick injury..
Needles and single lancets, Well needles can go back in the cover and back into the slot for spare needles in the pen box no probs, lancet if you change stap the old into the cover from the fresh one, and tuck it into the pocket in meter case!
My empty cartridge and vial go straight into household waste always have done..
I now use a pump, so things are slightly different, as I only change infusions sets every 3 days..
When I on holiday which isn't that often due to I won't put my dogs into kennels, so if my dogs can't come I don't go! But when I do I go back to the old ways of disposing of kit..
Old drinks can, everything goes in there then taped over and slung in the dust bin!