A drinking straw that is a oval rather than round tube. This has multi-usage given that more and more drinks now have non-liquid ingredients. Examples are black jelly pearls in bubble tea and puree in aloe vera drinks.
In fact in Asia many freshly made tropical drinks contain various jellies, beans, fruit cocktails. Take-away drinks as such require a spoon to scoop. A drinking straw with oval tube large enough to draw up these ingredients will be more convenient.
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