Perpetual Calendar Puzzle Blank Jewellery Era tumblers are 100% leakproof

Era tumblers are 100% leakproof with cold beverages and carbonated beverages with ice when in the locked position

then turn slightly right to lock it in place

Compatible with cold and carbonated beverages - Era tumblers are leakproof with cold beverages and carbonated beverages with ice when in the locked position

Protective Silicone Sleeve - Swappable sleeve helps prevent dents and dings

How do I lock and unlock the straw lid

Perpetual Calendar Puzzle Blank Jewellery Era tumblers are 100% leakproofWondering what day of the week it is? Want to either feel frustrated or super accomplished today? Our Perpetual Calendar Puzzle has you covered! This puzzle features simple pieces that fit together to show the correct date and day for any day of the year with multiple ways to solve for each date. Show it off on your desk with the included stand & keep your brain active so it doesn't turn into mush. and never forget what day of the week it is, no