Storing of unused flylines

[dollar]

went shopping for some sea gear and came across these plastic spools. they do come in various sizes and opt for 120mm (blue spool) and 160mm (red spool) dia spools. the 120mm spool fits lines up to 3 weights (as seen here with the brown sinking line) and the red spool worked perfectly for the intermidiate 6 weight line.
the idea was for storage at home but i think it could work equally well when fishing and in need of line change, easily stored in your back pack. i roughly paid 20 bucks for each.
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