Yes, the caps are technically recyclable and the best practice is to replace the cap on the tube before placing it in the recycling bin. Doing so will ensure they make it through the recycling sorting process, and help avoid litter of caps. Caps are made of a different plastic than the tube and thus some recyclers might prefer the caps to be removed before tubes are recycled. Please check your local recycling rules to be sure. We are continuing with our research to convert all of our caps into a more compatible material with the HDPE stream.