Hot Tea gives +15% stamina per sip, LP boosting buff, can be poured only at tea pot or mug.
Cold Tea gives +7.5% stamins per sip, no LP boosting buff, can be poured at any water countainer (flask, waterskin, bucket, wine barrel, demijohn).
Recipe of Hot Tea is same as for current Tea: just boil tea leaves in cauldron with tea pot and some water.
Recipe of Cold Tea: Hot Tea must be poured at Demijohn, which then must be placed at any house cellar, after 1 real time day Hot Tea will become Cold Tea with resulting quality softcapped by quality of Demijohn.
Also quality of Demijohn should be determined solely by raw glass.
Some calculations for interested people:
1 bucket of 10q water gives 100 sips or 500% stamina
4 tea pots of 10q tea gives 40 sips or 600% stamina
1 bucket of 10q Cold Tea will give 100 sips or 750% stamina
Right now drinking tea is better than drinking water of same quality, but as i know people still run 2+ buckets of high quality water. As i understand thats because high quality tea is more difficult to achive than high quality water - you need not only high q water, but also high q tea leaves and probably high q cauldron with tea pots. Also operating 2-3 buckets of water is much easier than operating 8-12 tea pots.
So i suggest adding Cold Tea, that is even more harder to craft high q (softcapping by Demijohn), but is more rewarding than simple tea (1.5 times more effective than water of same q) and is as simple to operate as usual water (cause of ability to pour Cold Tea at any water countainer).