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Looking at going with a bottle and pack over the winter and the old cage I have has lots its grip.
Ideally, a bottle with a flappy type cover over it and a good strong cage.
What's recommended?
Camelbak Podium bottle with a Camelbak "Mud Cap". They may have killed water bottles for some MTBers but they also make the best bottles by far.
Bontrager RXL Carbon Bottle Cage, use them on 3 different bikes and never dropped a bottle or broken a cage (oldest ones are about 5years old). They do a plastic "RL" cage which is almost as good. Whatever you do don't buy alloy cages, they fatigue\wear through\bend and don't hold bottles well.
If its a metal cage just bend it closed a bit.
http://forums.mtbr.com/nutrition-hydration/water-bottle-cage-bumpy-terrain-768142.html
Post number 33 of that thread shows what I used to do. I am not the author of that post.
For a less fancy version any elastic band will do.
Bottles with cak flaps are a pain. A crud guard or any other downtube guard will keep most of the muck off a bottle nozzle. The plastic elite cages are particularly good.
Halfords do a very good one - Corsa Elite and it comes in a couple of different sizes. I think the 550ml cost me £4 or £5.
Camelbak podium with a mud cap for my underslung bottle. I use an old specialised alu cage that's had a slight squash, run the same bottle and cage on my FS bike (underslung again) and I'm yet to have the bottle pop out accidentally.
[url= https://farm5.staticflickr.com/4348/36690939152_ea6e9b7d65_b.jp g" target="_blank">https://farm5.staticflickr.com/4348/36690939152_ea6e9b7d65_b.jp g"/> [/img][/url][url= https://flic.kr/p/XUfDVb ]Peak summer[/url] by [url= https://www.flickr.com/photos/le_grande_momo/ ]Matt Cotterill[/url], on Flickr
Lezyne bottle cages are really snug.
Bottle - Elite Corsa, some come with caps.
Cage - Elite Ciussi, add some grip tape for even more security.
I picked up some basic bottles from Halfords with a clip over plastic cover. They were on clearance for £2 each. Saw me through last winter till now.
I use them with a Spesh E cage on 1 bike and pdw cages on others. The basic Spesh cage is a really snug fit.
Edit to say:
These bottles
http://www.halfords.com/webapp/wcs/stores/servlet/ProductMobileDisplay?catalogId=10151&langId=-1&categoryId=312047&productId=1215219&storeId=10001
Decathlon.
Bontrager RXL Carbon Bottle Cage, use them on 3 different bikes and never dropped a bottle or broken a cage (oldest ones are about 5years old). They do a plastic "RL" cage which is almost as good.
I can vouch for the Bontrager RL cages. Haven't had a bottle fall out in 12 months. Also don't mark bottles half as much as metal ones.
The side-loading specialized cages seem to hold onto stuff very well and I prefer that mechanism.
2nd the Decathlon suggestion - you can nudge open the 'flappy bit' with your chin quite easily en-route to your bouche.