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Great, thanks.
That makes life a little easier as i don't see most of my beers staying in the bottle for too long and the ones i want to keep a sample a bit longer for i can just use the Coopers PET.
I forgot about the carb drops as i've been using these and they work ok for me at the moment, would 3 be alright in the 1.25? Maths wasn't one of my good subjects but 3 seems close to the mark.

i'd put four in, personally.

Four is definitely the go if you're using drops. Three returns a definite 'English Style' carbonation effect.

If you're watching your pennies, consider that:

Coopers carb drops are about four times as expensive as dextrose (with a wind assist - I bought Brewiser on sale at the W).
Dextrose is about twice as expensive as cheap white cane sugar.
A sugar measure is a couple of dollars.

You recoup the cost of the sugar measure in fairly short time. I think I got about six or seven standard brews from my last kilo of dextrose, so the sugar measure was paid for somewhere around brew four (give or take).

I recall reading here or nearby that Coopers carbonate their bottle product with cane sugar.

SpillsMostOfIt wrote:I recall reading here or nearby that Coopers carbonate their bottle product with cane sugar.

Yep, that's correct, they prime their bottles with sucrose.

And I'd go 3 carbonation drops but would bulk prime if possible, for consistent results. Most homebrew in general is overcarbonated IMO.

I bottled a Coopers Pale Ale into old Coke 1.25l bottles yesterday and I used 3 1/2 carb drops per bottle. Perhaps I should have just used 4.