I haven't used the kit that you're referring to, but have used similiar vials to keep a variety of insects in the past (used to collect them all about 20 years ago). At the time, I already owned a sein, tweezers, and just purchased the vials and the alcohol/preservative compound seperately. I didn't spend as much as this kit costs, but again, that may be the going price these days.
Most kits contain a alcohol/preservative compound liquid in which the insects are preserved and hopefully their colors are not too bleached out in the process. Collecting the insects is interesting for sure and they can be handy when designing/tying up some flies for your next outing.
Most kits contain a alcohol/preservative compound liquid in which the insects are preserved and hopefully their colors are not too bleached out in the process. Collecting the insects is interesting for sure and they can be handy when designing/tying up some flies for your next outing.