M.F.
I agree had tubes understand...they are too cold..ok this is how I got mine warm with having to worry if they got to hot from running the bottle under warm water...and don't laugh..well at least not much. I put them under my boob...ok laugh body heat warmed them up to perfect temp I could quickly get them out from under there which my bra held them in anyway but I may have not needed a bra but still the point is body heat I don't have time to run around and my son see them so they go...under the boob.
Hope you had a laugh but it works. If that's not if it could be the feeling but you may want him looked at to be safe.