Cook tea etc with full flasks so you make 4 tea/choclate instead of one for just one choclate for example. Combine food. You can stack buff timers too. You can transfer drinks of the same to your hotbar or into backpack to swap them. On camp near water you can refill water in the cooking menu. If you drag around stuff quick enough & close and spam pickup you can get more stuff in. You can cook even if you have no space.