From the
Alchemy Guide;
Other items that can be combined
beehive + honeyrack = drop of honey
drop of honey + empty honey jar = full honey jar(temporary increase of +5 strength, agility, intelligence - +50 health/mana points)
bucket/basket + apple or tomato, oranges = full basket/bucket (this increases the value of fruit and vegetables from 1 or 2 gold all the way up to around 10)
Two stacks of straw = Haybed. Combine two stacks of straw on the ground to make hay and then use as a bed. Hay can not be moved once it is made, but you can combine stacks of straw in your inventory. Click on the straw to switch between a pile and bundle of straw
poison barrel + empty flask = poison potion (this does not require the alchemy skill)
wine glass + wine barrel = full wine glass
beer mug + beer keg = full beer mug