The lava-lamp wax sinks on cooling, so the surrounding liquid must have a density a little less than 0.9. Ordinary alcohol (ethanol) has a density of about 0.8, and a 40-50 per cent aqueous solution would have a density that could be adjusted to just below that of paraffin wax. The solid wax would then sink.
Now you know what to pack for Bora Bora you can get started. When you are done, weigh your bags. Luggage allowance for Air Tahiti inter-island flights is 20 kg/45 lb per person and strictly enforced (due to plane size). Divers may have 5kg extra. Carry on hand luggage is 3 kg/6.6lb. See more absolutely 'must know' info about flying to Bora Bora to ensure smooth Bora Bora travel.
Only one (1) piece of hand baggage per guest is allowed. The maximum dimension of baggage is 56cm x 36cm x 23cm/22inx 14in x 9in and the weight shall not exceed 7kgs. Such baggage must fit under the seat in front of you or in an enclosed storage compartment in the cabin. Items determined by Thai AirAsia to be of excessive weight or size or of an offensive nature will not be permitted on board.