I love stretching my ass with big objects. Unfortunately, I've never been able to do bottles, soda cans or larger toys. It feels like there is something in the way. I think my bone structure, pelvis?, is narrow there. If the toy is squishier, it will go, but hard objects won't. I've watched videos of guys and gals taking larger glass bottles and cans, huge dildoes and wish I could too. About 2" diameter is my max. I have used 2 dildoes at once but they have to be one over the other, not side by side...if that makes sense.