We can save data using 3 "common" methods in Sawtooth.
1/ Constructed lists.
2/ Free format hidden variables.
3/ Declaring variables in the Pass-In Fields and accessing them via the SetValue and GetValue SSI Script functions.
If I was to save a variable like a number or a string, I would typically use options 2/ or 3/. Option 3/ is the newer approach. If I was saving a bunch of brands, I would be using option 1/ (as you have used).
If I save the consideration set in a constructed list, I can use that constructed list in future questions to display all (or a subset) of that list. Furthermore, I can apply powerful SSI Script functions like ListValue, ListLabel, ListLength, ListHasParentMember, ListLabelsArray and so on in skips, question scripts, Perl, etc.
You can view the constructed list for any survey (regardless of being completed, incompleted or disqualified) in the admin module. You also have the ability to export the constructed list to SPSS, Excel, CSV, Tab, etc. file formats.
If you need further assistance or need to send me a Sawtooth file to look at, you can contact me at firstname.lastname@example.org.