Question about Rotho Albula waste bin 40L green

We have had the tub for a long time, not outside, but it has sunlight. No discolouration to be seen. But if we had it outside, it would be most likely to get squirmed away when it was empty again. That danger is almost greater than the plastic disintegrating. I mean, the plastic just gets brittle at some point and can crack (hot/cold).