There are lots of liquids you can mix chia seeds into. Just note that chia seeds usually take 10-30 minutes to start to absorb the liquid they're in to soften. Until then it's like eating slightly bigger poppyseeds. I recommend refrigerating them for 30 minutes-overnight. The Coffee Chia Pudding recipe on this page, Peanut Butter Chia Pudding, and Versatile Chia Pudding recipe are great options.