My violin outfit didn't come with a string tube, in spite of the product's photo showing one, so I bought some perspex tubing and made my own.
Here's a photo in which people might overlook a detail.
Is that string tube as stupid as I think it is, or am I missing a point?
I just keep my strings in their packaging until I use them. I think uncoiling them and holding them straight in a tube is pointless except maybe for certain types of gut strings.
It looks like the tube in your photo was intended to be a case humidifier (with the internal packing missing), rather than a string tube.
Yes Humidifier Tube without the sponge element inside. How are you able to fit a full length string tube in the same spot with the cushion in the way? I hope you are not bending or kinking the strings to get them to fit in the tube.
You might inquire whether the chinrest hold-down pad is removable to be able to replace the humidifier tube with a full-length string tube.
I have never bothered with a string tube; just leave the strings in the packaging until I'm ready to use them.
I was wondering what that pad was - I didn't think of the chinrest! I should have. But that would dictate that you have an even bigger pad on the other side - not possible with the bow holders there. Maybe the whole design has many flaws and I should compare it carefully with others.
With synthetic strings, I wouldn't bother with string tubes either. A lot of the paper envelopes have coatings now that protect the strings from tarnishing prematurely.
I see it now - initially all I could see was what I thought were loop ends on strings.
What's all the fuss about string tubes? I don't even keep plain guts in the tube; by the time Canada Post ships them over from Minnesota, they're well and coiled...
Why keep new strings in your case at all? Perhaps the last set you removed could be kept in the case as backups for possible broken strings. You wouldn't want to use a new string as an emergency replacement because the initial stretching would be untenable. But take your new sets out of the case and your storage options become pretty much unlimited.
My current strings are sold straight in a cardboard tube, so I keep them in my string tube.