Lub qhov ncauj dav Reagent Fwj nrog cov hmoov av pov thawj iav stopper yog pab tau rau khaws cia ob qho tib si kua thiab hmoov. Cov lub raj mis lub qhov ncauj thiab lub taub hau yog tshuab hauv av. Cov iav-rau-iav no yog ib qho kev sib khi uas tsis muaj roj hmab lossis cork stopper.

Cov nqaim-lub qhov ncauj, amber iav reagent fwj nrog hauv av-hauv iav stoppers yog pab tau rau khaws cia lub teeb-rhiab daws teeb meem. Lub hauv av-hauv iav stoppers muab cov huab cua nruj haum. Zoo tagnrho rau kev nyab xeeb khaws cov tshuaj hauv cov kua lossis hmoov.