It’s a glass bottle!  The serum spreads lightly and honestly my skin seems to love it.  It’s also a good volume for the price (100 mL) which makes it easier to use more.  Does seem to help skin however can tell yet if the heartleaf is better or just the usual cica / centella.  If looking for centella asiatica perhaps another serum might be better since it only contains the extract and not the individual active components (like the acids or madecassoside, asiaticoside etc )