Capacitor

The Duelund tinned copper is excellent ,slightly better then the Jupiter copper foil but only in a few areas not all ,a bit more top end resolution , the Odam I removed for the Jupiter in preamp section more realism and 
depth of instrument and tone in my system ,if you are using vacuum tubes 
then you may like the vh Odam cap. There is no Best capacitor 
For  every situation from many builds especially with speakers and many DIY guys I know .
the Duelund being Waay to big for many situations, and waay 
over priced for a small % improvement vs the Jupiter copper foil IMO.
the vh audio CU Teflon copper has the best resolution of any capacitor out there ,but very $$ but good to use as a bypass cap.

R, you continue to claim all boutique caps colored and distorted. W/K/V no coloration, only accurate. So, everyone using colored boutique caps has defective equipment which requires colored, distorted boutique caps to sound natural. So, now we've gone from best caps to best equipment which you seem to have exclusive possession of here. So, we mere mortals with defective equipment can't appreciate the accuracy of your chosen cap.
There can be no dialogue with you,  you have the best ears, equipment and caps. Be happy in your delusion, I'm ok with you believing that. Why can't you let us be happy in our sad delusion?  This thread is about why and what we like our chosen caps, not making claims of a single best cap. Your posts rightfully belong in thread attempting to offer proof of an objectively best cap. See how many respond to that, should be a real fun thread.

@audioman58 

“but good to use as a bypass cap.”

Any value in bypassing an ODAM with a CuTF? I have a couple of CuTFs lying around.

Reducing the value not a good idea ,when engineered the UF needs to be the same in s amp,preamp, in a loudspeaker 
maximum different change under3%
bypass caps for small  values very common to use .01 uf 
the vh audio Cu Copper Teflon are excellent as PauL mentioned
the VH CU is superior to the Odam  and can be used values .01 
are typically used in the HF range,but can put on a midrange also.

I would not use a bypass cap in a crossover. Don’t think they sound right in this application. Makes the sound sort of nervous. One great cap is better. Bypass caps are great in power supplies and SOMETIMES in coupling and output positions. It depends on the combo of caps used. 

Odam and Cutf sound wonderful together in electronics.  The .01uf Cutf combined with a .22-3 uf Odam works great.  You get a little more air and detail.  
I personally prefer the sound of Odam over the Cutf used alone. The Cutf is just too lively and exposing for  my tastes. This is a personal preference thing for me however.