@ShadowWalker It's to make the slime stick around. The 1st chapter said that type of slime was so weak that it'd die from being touched. So if it devours potion after potion it'll have a slightly longer lifespan. So to avoid an too early death the author had it devour potion after potion.
@Choco-Bar Heck if I know, I just figure it's a quick and easy way of keeping a slime that dies from a poke living past a week. Probably becomes a potion slime and can heal not just itself (so it doesn't die) but can heal her as well by splitting in two and she eats/drinks the new slime.
@tonarinoalex there is a WN, searching the japanese name should bring it up on soyusetu. I think someone translated a bit, but sometimes those things disappear
https://www.novelupdates.com/series/the-weakest-tamer-trash-picking-journey-begins/?__cf_chl_jschl_tk__=3dc186961b014f11a155b2613afc6f721472bc34-1587344599-0-AaoYPHKefc9VRQyI-t9sHSxFkt2pI8x8d9H-mh5yhWMuDPEttIYIUkUVAxGvgYocvWdOYPCTpkkQEZfG8XeCXR8g6yThuovTmD2qsw7xoztepMgPxW8v1xUMORKuyvCJZC6AvQAzNjHBgdKu9fJzcPF_3uNi5cQHkA-BORK8P4IErXR867qeNBGfZH_gKN-CQu_04k0ZnipkaDyHMkA62ZJq7H16RIQApY-8G2tpip7JUNPA2ijaH-KBrBOf2EcFo0GfNXsHsDitmDJyqWESyppaM9k5IMP5zSWJLBz6hgUX-L0vPdbfsugDjBtzpoF12_c1ylkJbcFi6G29TNoEjNiMivwTbHdsbKRWig72_kmt ps: the page is semi broken so some chapters are harder to access
at the start the slime only eats healing potions, they can be any healing potions even defective ones, later on the story MC gets hurt and the slime heal her by wraping the wound around her injury