Only give 4 out of 5 stars because whoever made this should make them with the glass thicker even tho shehe would have to charge more if its near unbreakable with normal use this item would be seen as worth its weight if it was 4fexplained why its had its costvaule

So its use as a pipe is more for a quick few drags just

Hence size of pipe to be fair it has a subtle flat bottom on the bowl a glass bubble to hold one side and air inlet hole on other side

I have yet to see it change colour it seems to become more see through or lighter in colour rather than change to some other hues