Crochet a Water Bottle Cozy

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Reusable aluminum water bottles are better for the environment than purchasing bottled water or other drinks in plastic containers, but if you have one, you may have noticed how well aluminum conducts heat. With a bit of insulation, you can keep your beverage and your fingers at their own temperatures longer. This is a small project, so you could easily complete it using remnants of yarn from other projects.

This article gives information on making the cozy to a custom size alongside numbers of stitches used to obtain the specific result pictured. Use whichever seems to work best for you. Working through parts about the custom size will teach you a lot about crocheting without a pattern; in fact, you could crochet any cylindrical object with confidence this way. The materials shown are listed under Things You'll Need below.

Steps

  1. Measure the circumference (the distance around) of your water bottle. The key to sizing this cozy is to get the right number of stitches to go that distance.

    • Because this is a crocheted fabric, it will be a little stretchy, so aim to crochet something that is a bit snug.
  2. Measure your stitches. Chain until you have about three inches. Chain two more and double crochet into the third chain from the hook. Double crochet one stitch per stitch back across the row you created.

  3. Count the number of stitches in the test piece and measure their length. Try to count in the middle to avoid figuring in any unevenness at the ends. Here, there are seven stitches (gauge stitches) in two inches (5cm) (gauge length). Measure the stitch length in the same units you used to measure the bottle circumference.

  4. Do a simple proportion.

    gauge stitches / gauge length = total stitches / bottle circumference
    total stitches = (gauge stitches x bottle diameter) / gauge length
    here, total stitches = (7 stitches x 9 inches) / two inches = 31 stitches.

    • For this example, round down to an even 30 stitches for easier math and a slightly tighter fit. Jot this number down.
    • Unravel the gauge piece if you wish to recover the yarn.
  5. Create the circular bottom of the bottle cozy (see tips for more information on customizing this). The idea is to come out with a flat disk, about the same diameter as the water bottle or a bit smaller, and with as many stitches as the "total stitches" number above in the final row.

  6. Tie a slip knot, chain a few stitches (4-6) and join with a slip stitch to form a ring.

  7. Chain 3 to start the first round (counts as first double crochet) and double crochet into the ring.



    • The example shown uses a total 15 double crochet into the ring.

  8. Slip stitch to join.

  9. Chain two to start the second round (counts as first double crochet). Then double crochet into each stitch from the first round. The example uses 2 stitches per inch to arrive at 30 stitches, the "total stitches" number from above. Add additional rounds if needed to produce the diameter required. See the tips below on how to do this.

  10. Form the sides. Chain two and double crochet one stitch into each stitch of the previous round.

    • You could chain one and single crochet this round instead, but the double crochet produces a sharper-looking "corner" at the bottom of the bottle cozy.
    • To avoid a spiral effect (optional): Place a stitch marker at the beginning of the round. Each time you reach it, join with a slip stitch and chain one. Otherwise, just stitch into the next available stitch. This is a bit more important (but still not required) if you want to make the ribbon loops.

    • At one stitch per stitch on a round piece such as this, two things should happen. First, the edges should curl up (or down) and start to form a cylinder. Second, you should have the same number of stitches in each subsequent round.
  11. Try the base on the water bottle in the first couple of rows. If it's too loose, you'll need fewer stitches in the last row of the round base. If it's too tight, add a few stitches, either to the round base or to one of the bottom rows of single crochet right near the base. Either way, it's best to find this out now.

  12. Decide where you'd like the ribbon loops, and how many you'd like. With a good tie at the top, they are mostly decorative, but if you'd like, you can make them line up with a feature on the bottle, such as a narrower section.
    • If you don't want the optional ribbon loops, continue the entire bottle cozy in a single crochet until you reach the desired height.
    • Place the loops a bit lower than you think you will need them, remembering that the piece will stretch somewhat when in use.
  13. Create the ribbon loops. Finish the round at the bottom of where you want the loop.
    1. Chain three.

    2. Double crochet into the next two stitches from the previous round (total of three double crochet including the chain).

    3. Triple crochet into the next stitch. The triple crochet is a little too tall for the row of double crochets around it, so it forms a sort of belt loop that will stick out if you tug on it a bit.

    4. Continue the pattern of three double crochet followed by a triple crochet for the rest of the round. Make a one or two loops with only two double crochet between if you need to to come out even on number of stitches and loops.

    5. Join with a slip stitch, chain 1, and proceed with additional rounds of single crochet as before.
  14. Continue alternating several rounds of single crochet with a round of loops until you reach the height you desire.

    • Finish with at least one round of single crochet.
    • Stop short of the neck of the bottle.
  15. Create the loops for tying the cozy closed. Chain six (or some other number that produces a desired length). Skip three stitches (or some other number that produces the desired spacing), and slip stitch into the next stitch. Repeat all the way around.



  16. Tie off and stitch in the ends.
  17. Add ties and laces as desired. Any ribbon, cord or yarn will do. This cozy uses six strands of leftover yarn, braided tightly and tied in a simple knot at both ends to tie the bottle in.

    • Use a cord that doesn't stretch too much for the top closure.
    • Thread the ribbons through the loops formed by the triple crochet as you would a belt through belt loops. Tug on the loops gently to open them up, if needed. You can tie the ends in knots or bows, tuck them in, stitch them together, or leave them hanging loose to create the effect you prefer.

    • Lace a cord or braided yarn through the loops around the top and tie the bottle into the cozy. Tie it so that you'll be able to get the bottle out again for cleaning.

  18. Fashion any handles or straps you want and stitch them to the cozy or use the loops already built in to attach them. You could crochet or braid them from any yarn that's left over, use more of whatever ribbon you're using, or recycle some fabric (perhaps an old necktie?), whatever you prefer.

Tips

  • If you use 100% wool yarn it will insulate even better than cotton yarn.
  • As a gift, purchase the water bottle for somebody (they're fairly inexpensive), make the cozy for it, and give both as a set. Remember to keep your recipient's favorite colors in mind.
  • Round to a multiple of four as the "total stitches" number to get the pattern of loops to come out even, or space the loops differently so that they come out evenly with the number of stitches you are using.
  • If you're doing more than two rows of loops, count the rows between them to make them equal distances apart.
  • When creating the bottom, the aim is to create a flat disk that's about the same diameter as the water bottle or a bit smaller with the "total stitches" as the number of stitches in the last row. Use any combination of single and double crochet and increasing that will produce that.
    • For the piece to lay flat, the circumference of each round, in stitches, must match its diameter. Get from circumference to diameter using C = π*D, where π = 3.14... or in the case of crochet stitches, about 3. Get from circumference to number of stitches just as you did in step 4 above.
    • If your disk is cupping or dishing, you have too few stitches for the diameter and you should increase more. A little cupping on the base of this pattern won't harm anything.
    • If your disk is ruffling or looking like a potato chip, you have too many stitches for the diameter and you should not increase as much. This is an increase of three stitches per stitch, which would produce 45 stitches in the second round.
    • Crocheting one stitch per stitch on something round like this will produce a cylinder, which is how the sides of this pattern are formed. The circumference of that cylinder will be the number of stitches times the length of that stitch.

Things You'll Need

  • Sizes given here are as shown, for reference. Use whatever yarn, hook, and bottle you have and adjust the size as needed.
  • Bottle: three inch (7.5cm) diameter, 8 1/4 inches (21cm) tall, to the neck.
  • Hook: Size 10 or J (U.S.)
  • Yarn: recycled cotton, a bit thinner than standard worsted weight acrylic. Two fist-sized balls for the cozy, a third if desired for straps.
  • Coordinating/contrasting ribbon, yarn, cord, etc., optional.
  • Scissors
  • Tape measure and/or ruler
  • Yarn needle for sewing in ends

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