Out of the Blue Bubble Refill, 235ml, reference 36/0049, is the replacement liquid for bubble guns and other bubble toys. Out of the Blue is a German brand of toys and leisure items, known for its variety of simple and fun play products for different ages. Having a refill available prevents the fun from ending as soon as the toy's original liquid runs out, extending the use of the same toy for longer. It is a preferred option for those who already have a bubble toy and want to continue using it without buying a new one.