seeking advice on iso pucks /stands or similair that won't stain speakers?

looking to place some isolation pucks on my speaker stands under the base of my speakers, worried that the Isoacoustics stuff will stain the bottom of the speakers

the actual iso 'stands' appear to me to be less likely to stain over their pucks

noticed Amazon has a bunch of anti vibration rubber pods also for laundry machines that might work

if anybody has experience with products pertaining to this issue would appreciate your response