Bamboo toddler cups: what to look for

Bamboo cups appeal for obvious reasons: they are not plastic, they do not shatter, and they feel better in the hand than either alternative. They also have real limits, and the limits are worth knowing before rather than after.

Two different things called bamboo

The word covers two constructions that behave very differently.

Solid bamboo — turned or laminated from the plant itself. Heavier, with visible grain, and it behaves like wood: it absorbs moisture, it can crack if dried too fast, and it should not go in a dishwasher.

Bamboo fibre composite — powdered bamboo bound with a resin, usually melamine, and moulded. Lighter, uniform in colour, more durable in daily use, and usually dishwasher safe on a lower shelf.

Most toddler cups are the second. The distinction matters for two reasons: how you wash them, and how they behave with heat.

Heat, which is the important limit

Melamine-bound bamboo composite should not be microwaved. Heating it above its rated temperature can degrade the binder, and every reputable maker states this on the packaging.

Practically, that means these cups are for cold and warm drinks — water, milk, juice — not for heating anything in. That is not a defect; it is what the material is.

Solid bamboo is likewise not a microwave material, for the simpler reason that it is wood.

Where a maker states microwave or dishwasher suitability, we repeat it exactly. Where they say nothing, the listing says nothing rather than assuming.

Washing

Solid bamboo: hand wash in warm soapy water, rinse and dry immediately. Do not soak, do not leave standing in water, do not put it in a dishwasher. A dishwasher’s heat and prolonged wet cycle is what splits bamboo.

Bamboo composite: usually top-rack dishwasher safe. The heating element in a dishwasher is at the bottom, and the bottom rack is where composite cups discolour and craze.

Both benefit from being dried rather than left to drain. Water sitting in a base ring is the most common cause of staining.

Sizes for small children

Around ten ounces is the usual toddler size and it is larger than it sounds — an open cup that size is heavy when full and a child will spill it.

For a child learning an open cup, fill it a third full. The cup size is about what fits the hand; the fill is about what can be lifted.

Grip is worth thinking about. A straight-sided cup is harder for small hands than one with a slight waist or a textured surface, and a wider base tips less.

What about lids and straws

Bamboo cups are often sold with silicone lids and straws. Silicone is the right material there — flexible, heat-tolerant, easy to clean — and it is a separate part with its own cleaning requirement.

Straws need a brush. A straw that is only rinsed builds residue inside, and that is where things go wrong in a way nobody sees. Where a set includes a cleaning brush, that is a genuine part of the product rather than a giveaway.

Staining and smell

Bamboo picks up colour from strongly pigmented drinks — blackcurrant, beetroot, turmeric. It is cosmetic and it does not come out completely.

Odour is the other one. A cup that has held milk and been left overnight will hold the smell. Washing promptly prevents it; bicarbonate of soda paste, left for a few minutes and rinsed thoroughly, deals with most of it afterwards.

Lifespan, honestly

A bamboo composite cup in daily use in a household with young children is a one to three year item. It will craze, stain and eventually chip at the rim, and a chipped rim is where it should be retired.

That is genuinely better than a disposable cup and genuinely worse than stainless steel. Anybody claiming a bamboo cup lasts forever is describing a different object.

Wheat straw, the other alternative

Wheat straw cups — wheat husk fibre bound with polypropylene — sit alongside these on the shelf. They are lighter, cheaper, genuinely unbreakable in normal use, and usually both dishwasher and microwave safe.

They feel more like plastic, because partly they are. For a camping set, a picnic or an outdoor table they are the more practical choice; for a kitchen cupboard bamboo is the nicer object.

Where to look

Bamboo and wooden cups, including the toddler sets, are on the bamboo and wooden cups page. Wheat straw and shatter-resistant tumblers are under reusable tumblers. The disposable half of the shop is on the disposable paper cups and compostable and plant-based cups pages.