Frozen bottles

I have used frozen bottles on the past to kepp Fuzzy cool, whe he was alive, nowI have 2 baby bunnies and wondering is it ok at this age to use a frzen bottle in this warm weather. They are 9weeks old now and one is a lionhead? I worry about them while I`m at work as I can`t always get back at dinner time.
Also what are other lionhead owners using for bedding and covering the newspaper in the hutch ? For eg - straw/wood shavings. I know Ihave seen this writtn else where but I am using "internet tv" and it takes forever to gofrom one pge to the next. This way I can also be sure and what brand.
Thanks.

For a lionhead if it particularly long haired i wouldnt use wood shavings. Mine is more like a very long haired rabbit and i use newspaper or blankets/vet bedding. I have a box of hay for them to dig/sit/eat in and a litter tray containing wood based cat litter.

Ok, thanks. So you are saying that the lionhead should only have newspaper onthe floor but bedding in the `bedroom` ? How does this effect your daily cleaning out or wet newspaper etc??
And when I put the lionhead and the mini lop together in the future, will it be ok for the mini lop to be without the wood shavings ??

also - there is a lionhead called Nala in the `Funny bunnies` book. Is that yours or coincidence???