500ml spray/mist bottle. To spray the the insides of the bag and top of the kit occasionally to keep the humidity high before the first mushrooms appear.
After the first lot (flush) have been picked you can then give it a really good spray to get some of the moisture back in to the kit before the second flush comes.
We recommend giving it a good rinse out with hot soapy water. Fill the kettle and allow to cool before filling the sprayer. Don't keep the sprayer in direct sunlight and replace the water regularly to avoid contaminations.