XANGNIERReplacement Straws and Bite Valve Compatible with Zak Designs Kelso 15 oz Tumbler Water Bottle,4 Pcs Reusable Silicone Straws with Cleaning Brush for Zak Designs Kelso 12 oz Cups

Fit great and are perfect replacements. The clear straws are harder plastic, unlike the soft silicone of the namebrand cups. I almost like them more!

Fit perfectly! Was able to trade out parts. Same design that was on the cup we had. Extra parts were a plus to have on hand. The straw is a hard clear straw vs the flexible straw that came with the original. Comes with cleaning straw brush

Works identically to the zak cups straw when our child inevitably chewed up the original straws. Seems to hold up better than the ones that zak makes.

Our daughters love these cups and I love how easy they are to clean so we have a cupboard full of them. Unfortunately, our mini bernedoodle, Pudge, also loves these cups and has a habit of sneaking them off our couch/table/etc so he can eat the straws off of them. The cups are too pricey to just toss so I was so glad I found these replacement straws. They do fit and they work great BUT they aren’t quite as snug a fit as the originals so occasionally they leak. Not a deal breaker but not awesome either. My only other complaint is I wish they had more color options for purchase.

If you have a piranha child like I do then you will know that silicone straws don’t last long. I was so happy to find these because we love our Zak! cups and hated the idea of throwing away a whole cup just because the straw had been chewed through. These fit the cups perfectly, are easy to use, help prevent leaks, and clean easily in the dishwasher.

I haven't needed the valves yet but have needed the straws and will end up ordering again. Straws are much better than the original. Original staws are slightly flexible plastic so they'd often come out the dishwasher more oval then round and I'd have the bend it back which was easy. The original also discolored from juice and chocolate milk and just look gross now. These are much more sturdy. The clear plastic is hard and doesn't warp any in the dishwasher and seem to just fit the cups better too.Will order again.

Three out of four of the replacement straws were great but the 4th was deformed so it couldn't be used. I'd buy again if I was confident they'd all be usable

I bought these because my cat had chewed up a couple of the outer straws of the ones that came with the original cups. Much cheaper than purchasing a whole new cup system, and now I have a couple spares also. They don't leak and they fit perfectly!