I always keep my cutters in an old eye glass case, even when at home in my sewing drawer. It's the kind that has one end open.

I saw a little pouch made out of a pot holder. Just sew it up and stick your cutter inside. Very easy and cheap.

I have a little plastic case that I got from Hobby Lobby. It's just the right size and they come in several different colors.

I often use a pretty Christmas tin to hold items like that.

My travel sewing kit is a plastic box with the snap on lid. Cutter, pins, snips, etc. all fit nicely in it and it is really handy to grab and go.

My sentiments exactly. If you're in an accident, a rotary cutter flying through the air is probably going to be the least of your worries. My rotary cutter locks in a closed position so it's never something I worry about. If you're concerned, as Sandy said, use your trunk.

The reason it I put this question was here in UK you can't carry knives not even a pen knife. I love how we are all safety first but would police see it that way I wonder,l.

Thank you for all your replies they have given me ideas.

Be sure to seat belt in your sewing machine........safer for the machine than the trunk.....you really do not want your machine to learn to fly, it would never sit still again.

I press the lock button so they can't open and cut someone or something, and I put them in those plastic take-out food containers with other similar stuff.The blade can't get chipped or do any damage.

The pencil cases that zip shut are great. I get them at the dollar store. Canvas type material, plastic window so you can see what is inside, bright fun colors, you can put sharp items in one color, pencils,marker and chalk in another color. Not to big or bulky but will hold a lot of small items that would be easily lose. You could even put small quilt shapes already cut in them. Zippered pencil cases is the way to go for me.