[header] How to clean a camelbak bladder [title] Mix ¼ cup (59.15 ml) of baking soda with ¾ cup (177 ml) of water per liter volume. [step] The water needs to be hot, but not boiling, as this can damage the bladder. Mix the ingredients until they are well combined. 
[substeps] For example, if your camelbak bladder holds 2 liters (8.45 cups) of water, then mix ½ cup (118. 3 ml) of baking soda with 1 ½ cups (354.8 ml) of water.