LifeStraw Personal Water Filter, $17.47 LifeStraws are portable, personal water filters that make non-potable water drinkable. This year, American Prime members rushed to stock up on LifeStraws, which were on sale for just under $10. In total, more than 200,000 LifeStraws were purchased over the course of the sales event — the demand was so high that the filters sold out frequently over the course of Prime Day. Runners-up: Instant Pot DUO60, $99.95 (This model actually sold out on Prime Day, but you can still choose from the many other Instant Pot models available) 23andMe Health + Ancestry Kits, $199 Sony PlayStation Classic, $40.99 Shoppers in the United Kingdom got nostalgic this Prime Day, jumping at a deal to snag the PlayStation Classic — a miniature version of the original PlayStation launched in 1994 — for about $20. Pre-loaded with 20 games from the original console, and complete with two classic controllers, this set is a steal and sure to provide hours of old-fashioned fun. Runners-up: Oral-B SmartSeries Electric Toothbrush, $99.99 Shark Vacuum Cleaner, $149.99 Meiji Fresh Milk, price n/a July 15 and 16 brought Singaporeans great deals on some of their favorite beverages. The best-seller was Meiji fresh milk, which you actually can't find on Amazon in the US, but you can find plenty of other yummy Meiji sweets as well as milk from a variety of brands. Runners-up: Coca-Cola Zero Sugar Soft Drink, 12-pack, $4.68 Kleenex Clean Care Bath Tissue, 12-pack, $29.35 Yobola True Wireless Headphones, £37.99 ($47.25 USD) Spanish shoppers loved the steep discount on these Hi-Fi Bluetooth headphones. While they're usually £139.99 ($174.08), they were on a major discount for Prime Day — and can still be found at a low price. These pairs can only be found on Amazon's international site, but they still ship to the US. Runners-up: Philips Multigroom Series 7000 All-in-One Trimmer, $54.95 DoDot Diapers, 36-pack, $27.02 Nintendo Switch, $299 Prime members in Mexico went all in on gaming deals. The Nintendo switch, an innovative device that's a handheld and TV-based console in one, was the most-purchased product. Coming in next on the list was an HP monitor, which can be used as a complement to the switch, or on its own. Runners-up: HP Monitor 22w Borderless, $112 Nautica Travel Sport Eau de Toilette Spray, $29.99 Al Ain Bottled Water, price n/a In the United Arab Emirates, Prime members used Prime Day to stock up on household staples. Bottled water was the most popular purchase, with laundry detergent and toilet paper falling close behind. Runners-up: Ariel Aroma Detergent, 88 loads, $15.88 Fine Towel Tissue Roll, n/a (not available in the US, but check out Amazon's alternatives) Mama Bear Diapers, 4-pack, $36.99 Carts in the Netherlands were filled with diapers from Mama Bear, Amazon's in-house baby brand. Other practical purchases, like memory cards and lightbulbs, also topped the list. Runners-up: SanDisk 128 GB Memory Card, $64.99 Philips Hue White and Color Ambiance Light, $44.63 JBL Charge 3 Bluetooth Speaker, $99.95 This durable, waterproof speaker is a popular buy all year round, but it was the most popular this Prime Day in Luxembourg. Other home and tech purchases made the list, like stainless steel pans and robot vacuums. Runners-up: Tefal Jamie Oliver Stainless Steel Pan, $57.93 iRobot Roomba 671, $289.99 Happy Belly Water, ¥1,245 ($11.52) Prime Day in Japan was defined by utilitarian purchases. Water bottles topped the list, followed by a practical portable charger and diapers. Runners-up: Anker PowerCore 10,000 Mobile Battery, $33.99 Pampers Premium Protection Diapers, 92-count, $32.12 Nescafé Dolce Gusto Barista Caffè Espresso, 50-count, $34.99 They say Italians know their coffee, so it only makes sense that the most-purchased product in Italy this Prime Day was a pack of these Italian-style coffee pods. Practical purchases like detergent and a portable charger also topped the list. Runners-up: Dash 3-in-1 Detergent Pod, £21.11 ($26.24) AUKEY Powerbank Portable Charger, $33.99 Syska 9-Watt Smart LED Bulb Compatible with Amazon Alexa, $27.06 Smart light bulbs — which can change color and be completely controlled with just your voice — were the stars of Prime Day in India. Bluetooth headphones and a discreet bathroom fragrance also made the list of top purchases. Runners-up: BoAt Rockerz Sports Bluetooth Wireless Earphones Godrej Aer Pocket Bathroom Fragrance, $18.98 JBL Charge 3 Bluetooth Speaker, $99.95 A repeat best seller, the JBL Charge 3 was not only a popular buy in Luxembourg, but in Germany and Austria too. Runners-up: Tefal Jamie Oliver Stainless Steel Pan, $57.93 OSRAM Smart+ Plug Zigbee Switchable Light Socket, n/a iRobot Roomba 671, $289.99 This robot vacuum can clean your floor without you lifting a finger — so we're not suprised it made this best-seller list a couple of times. It was the most popular purchase among French Prime members. Runners-up: Lunii Story Telling Factory, n/a Oral-B SmartSeries Electric Toothbrush, $99.99 Dove Exfoliating Scrub, $5.94 Beauty products were the most-bought items among Chinese Prime members. A Dove body polish topped the list, followed by a hydrating eye cream and an at-home hair removal tool. Runners-up: L'Oreal Rejuvenating Eye Cream, $12.39 Silk'n Permanent Hair Removal Device, $204.35 PlayStation 4 Slim with Spiderman and Horizon Zero Dawn, $353.98 A PlayStation 4 Slim bundle, which comes with two hit games, was so popular on Prime Day that it's still sold out right now. It topped the best-sellers list in Canada, along with the popular LifeStraw and 23andMe kit. Runners-up: LifeStraw Personal Water Filter, $17.47 23andMe Health + Ancestry Kits, $199 OSRAM Smart+ Plug Zigbee Switchable Light Socket, n/a A smart plug, which lets you control tech with your devices, was the best-seller in Belgium — we couldn't find the exact model on Amazon in the US, but we attached a similar alternative. Runners-up: SanDisk 128 GB Memory Card, $64.99 Brita Water Filter, 6-count, $22.47 Mario Kart 8 Deluxe, $49.99 Australian shoppers loved snagging this classic, family-fun game on discount. Along with Mario Kart, practical purchases like dishwasher detergent and diapers were best sellers. Runners-up: Finish Powerball All-in-1 Max Dishwasher Tablets, 94-count, $14.36 Huggies Ultra Dry Nappies, 172-count, $38.10