Supa-Kill Liquid Bait is for use when there is too much food competition and the rodent needs to drink. 
Rats need to drink otherwise they will dehydrate. Mice can extract moisture from the food it eats. It does not necessarily need to drink but should liquid be provided, they will drink.
Liquid Bait Dispenser

Supa-Kill Liquid Bait Dispenser

The Supa-Kill Liquid Bait Dispenser is made from ABS plastic with a transparent top to see the amount of liquid placed. There are measurements on the side of the top for accurate doses. The base is red in colour and has a small drinking area to eliminate debris settling on the liquid.