I use these self healing stoppers: https://www.amazon.com/dp/B07JGVBSVS/ref=cm_sw_r_cp_apa_glt_fabc_RJG7C6J6HJYNPREQ3V68?_encoding=UTF8&psc=1

With these vials: https://www.amazon.com/dp/B07MSFM5NC/ref=cm_sw_r_cp_apa_glt_fabc_J8H3515H78BA5WV9AD29?_encoding=UTF8&psc=1

Solvent I usually use propylene glycol.

Edit: I should mention I use those stoppers specifically cause I use them for mycology and they were left over. Those vials were the best bang for buck I could find on Amazon that fit the stoppers.