• Edible Rice Straws are made for single use, with cold drinks. Straws can be kept for up to 2 hours in a cold drink. We do not recommend using them for hot drinks as the straws may melt and will give a lightly rice flavour. The straws are fully natural and edible, but we recommend the straws to be used for drinking only. Do not put the straw in a can of a softdrink, as you will have a foaming effect. Once you put the soft drink into a glass, you will not have a foaming effect. There is no contamination whatsoever, it is just a chemical reaction between the gas of the softdrink, the airtightness of the can and the rice straw.