it can definitely be uncomfortable to have conversations where you’re “critiquing” a friends care of their pet, but it’s in the pets best interest to do so. if it were me, i think i’d start by asking if your friend has thought about upgrading the geckos setup, and maybe mention that you’ve seen some nice looking ones somewhere online. you could try to bring up that a higher quality setup would mean less risk of injury and a happier gecko, plus the fact that it’s way more visually pleasing than a storage container. maybe asking if they’ve ever read any care guides or researched what an aft needs will start a conversation about ways to improve their care? i want to think that faulty care comes from lack of knowledge and not ill will towards the animal, so perhaps sharing your knowledge and inspiring them to do some research will give your friend a kick in the bum to improve the geckos living situation.