In brief: Did you manage to grab some bargains during the first 24 hours of Prime Day? For those wondering which items proved most popular during day one of the two-day event, Amazon has revealed the best-selling deals.

It might not come as too much of a surprise to learn that Amazon's own devices, which are heavily discounted during Prime Day, are proving massively popular. Thanks to its all-time low price of $14.99---a 60 percent reduction---the Fire TV Stick with Alexa Voice Remote sold so quickly that it was briefly listed as out of stock. The second generation of this Fire Stick also comes with $45 Sling TV credit.

A different Alexa product, the third-generation Echo Dot, was another one of yesterday's best-selling items. The smart speaker is on offer at $22, marking a 56 percent discount from its usual price. Amazon said that millions of Alexa devices were sold during the first day of the sale.

The Instant Pot DUO Plus 60, a cooker that combines nine kitchen appliances--- pressure cooker, slow cooker, rice cooker, yogurt maker, egg cooker, saute, steamer, warmer, and sterilizer---found itself in the top four. It's also the number one seller in Amazon's Kitchen & Dining category.

Finally, and somewhat unexpectedly, was the LifeStraw Personal Water Filter. Designed for hikers, travelers, and outdoor activities, the straw's microfiltration membrane removes 99.999999% of waterborne bacteria and 99.999% of waterborne parasites. But if the comments are anything to go by, don't try using it to drink your own urine.

Make sure to check out our 200 hand-picked Amazon tech deals that are part of Prime Day 2019.